79774864 has 20 divisors (see below), whose sum is σ = 166453756. Its totient is φ = 36819072.

The previous prime is 79774859. The next prime is 79774867. The reversal of 79774864 is 46847797.

It can be written as a sum of positive squares in 2 ways, for example, as 22014864 + 57760000 = 4692^2 + 7600^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (79774867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191559 + ... + 191974.

Almost surely, 2^79774864 is an apocalyptic number.

It is an amenable number.

79774864 is an abundant number, since it is smaller than the sum of its proper divisors (86678892).

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

79774864 is a wasteful number, since it uses less digits than its factorization.

79774864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383554 (or 383548 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 79774864 is about 8931.6775579955. The cubic root of 79774864 is about 430.4823575716.

The spelling of 79774864 in words is "seventy-nine million, seven hundred seventy-four thousand, eight hundred sixty-four".