39904928 has 48 divisors (see below), whose sum is σ = 92897280. Its totient is φ = 16509696.

The previous prime is 39904913. The next prime is 39904937. The reversal of 39904928 is 82940993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425 + ... + 9567.

It is an arithmetic number, because the mean of its divisors is an integer number (1935360).

Almost surely, 2^39904928 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 39904928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46448640).

39904928 is an abundant number, since it is smaller than the sum of its proper divisors (52992352).

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

39904928 is a wasteful number, since it uses less digits than its factorization.

39904928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6189 (or 6181 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 39904928 is about 6317.0347474112. The cubic root of 39904928 is about 341.7240229970.

The spelling of 39904928 in words is "thirty-nine million, nine hundred four thousand, nine hundred twenty-eight".