7939904 has 56 divisors (see below), whose sum is σ = 18531840. Its totient is φ = 3303936.

The previous prime is 7939861. The next prime is 7939909. The reversal of 7939904 is 4099397.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7939909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16337 + ... + 16815.

Almost surely, 2^7939904 is an apocalyptic number.

7939904 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7939904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9265920).

7939904 is an abundant number, since it is smaller than the sum of its proper divisors (10591936).

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

7939904 is a wasteful number, since it uses less digits than its factorization.

7939904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 7939904 is about 2817.7835261070. The cubic root of 7939904 is about 199.4979407371.

The spelling of 7939904 in words is "seven million, nine hundred thirty-nine thousand, nine hundred four".