39904572 has 12 divisors (see below), whose sum is σ = 93110696. Its totient is φ = 13301520.

The previous prime is 39904567. The next prime is 39904577. The reversal of 39904572 is 27540993.

It is an interprime number because it is at equal distance from previous prime (39904567) and next prime (39904577).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 39904572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39904577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662679 + ... + 1662702.

Almost surely, 2^39904572 is an apocalyptic number.

It is an amenable number.

39904572 is an abundant number, since it is smaller than the sum of its proper divisors (53206124).

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

39904572 is a wasteful number, since it uses less digits than its factorization.

39904572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325388 (or 3325386 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 39904572 is about 6317.0065695707. The cubic root of 39904572 is about 341.7230067974.

The spelling of 39904572 in words is "thirty-nine million, nine hundred four thousand, five hundred seventy-two".