7640904 has 32 divisors (see below), whose sum is σ = 19465920. Its totient is φ = 2498496.

The previous prime is 7640903. The next prime is 7640909. The reversal of 7640904 is 4090467.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732 + ... + 4275.

It is an arithmetic number, because the mean of its divisors is an integer number (608310).

Almost surely, 2^7640904 is an apocalyptic number.

It is an amenable number.

7640904 is an abundant number, since it is smaller than the sum of its proper divisors (11825016).

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

7640904 is a wasteful number, since it uses less digits than its factorization.

7640904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6069 (or 6065 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 7640904 is about 2764.2185152408. The cubic root of 7640904 is about 196.9616079514.

The spelling of 7640904 in words is "seven million, six hundred forty thousand, nine hundred four".