7992640 has 28 divisors (see below), whose sum is σ = 19033236. Its totient is φ = 3196928.

The previous prime is 7992619. The next prime is 7992659. The reversal of 7992640 is 462997.

It can be written as a sum of positive squares in 2 ways, for example, as 1149184 + 6843456 = 1072^2 + 2616^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7992640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12169 + ... + 12808.

Almost surely, 2^7992640 is an apocalyptic number.

It is an amenable number.

7992640 is an abundant number, since it is smaller than the sum of its proper divisors (11040596).

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

7992640 is a wasteful number, since it uses less digits than its factorization.

7992640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24994 (or 24984 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 7992640 is about 2827.1257488835. The cubic root of 7992640 is about 199.9386478482.

The spelling of 7992640 in words is "seven million, nine hundred ninety-two thousand, six hundred forty".