40931904 has 168 divisors, whose sum is σ = 125853952. Its totient is φ = 11658240.

The previous prime is 40931893. The next prime is 40931911. The reversal of 40931904 is 40913904.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1320369 + ... + 1320399.

Almost surely, 2^40931904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40931904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62926976).

40931904 is an abundant number, since it is smaller than the sum of its proper divisors (84922048).

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

40931904 is a wasteful number, since it uses less digits than its factorization.

40931904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40931904 is about 6397.8046234626. The cubic root of 40931904 is about 344.6307159748.

The spelling of 40931904 in words is "forty million, nine hundred thirty-one thousand, nine hundred four".