7936640 has 32 divisors (see below), whose sum is σ = 18975060. Its totient is φ = 3174400.

The previous prime is 7936631. The next prime is 7936667. The reversal of 7936640 is 466397.

It can be written as a sum of positive squares in 2 ways, for example, as 7795264 + 141376 = 2792^2 + 376^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 7936640.

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, 5561 + ... + 6840.

Almost surely, 2^7936640 is an apocalyptic number.

It is an amenable number.

7936640 is an abundant number, since it is smaller than the sum of its proper divisors (11038420).

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

7936640 is a wasteful number, since it uses less digits than its factorization.

7936640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420 (or 12408 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 7936640 is about 2817.2042879422. The cubic root of 7936640 is about 199.4705999142.

The spelling of 7936640 in words is "seven million, nine hundred thirty-six thousand, six hundred forty".