79876640 has 24 divisors (see below), whose sum is σ = 188708940. Its totient is φ = 31950592.

The previous prime is 79876639. The next prime is 79876669. The reversal of 79876640 is 4667897.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 79352464 + 524176 = 8908^2 + 724^2 .

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, 249455 + ... + 249774.

Almost surely, 2^79876640 is an apocalyptic number.

It is an amenable number.

79876640 is an abundant number, since it is smaller than the sum of its proper divisors (108832300).

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

79876640 is a wasteful number, since it uses less digits than its factorization.

79876640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499244 (or 499236 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 79876640 is about 8937.3732158840. The cubic root of 79876640 is about 430.6653481840.

The spelling of 79876640 in words is "seventy-nine million, eight hundred seventy-six thousand, six hundred forty".