40686198 has 32 divisors (see below), whose sum is σ = 96000000. Its totient is φ = 11249280.

The previous prime is 40686187. The next prime is 40686203. The reversal of 40686198 is 89168604.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14323 + ... + 16926.

It is an arithmetic number, because the mean of its divisors is an integer number (3000000).

Almost surely, 2^40686198 is an apocalyptic number.

40686198 is an abundant number, since it is smaller than the sum of its proper divisors (55313802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40686198 is a wasteful number, since it uses less digits than its factorization.

40686198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31292.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 40686198 is about 6378.5733514635. The cubic root of 40686198 is about 343.9397485516.

The spelling of 40686198 in words is "forty million, six hundred eighty-six thousand, one hundred ninety-eight".