79772868 has 72 divisors (see below), whose sum is σ = 242598720. Its totient is φ = 21591360.

The previous prime is 79772863. The next prime is 79772873. The reversal of 79772868 is 86827797.

It is an interprime number because it is at equal distance from previous prime (79772863) and next prime (79772873).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79772863) 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 23 ways as a sum of consecutive naturals, for example, 3543 + ... + 13118.

Almost surely, 2^79772868 is an apocalyptic number.

It is an amenable number.

79772868 is an abundant number, since it is smaller than the sum of its proper divisors (162825852).

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

79772868 is a wasteful number, since it uses less digits than its factorization.

79772868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16697 (or 16692 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 79772868 is about 8931.5658201684. The cubic root of 79772868 is about 430.4787672596.

The spelling of 79772868 in words is "seventy-nine million, seven hundred seventy-two thousand, eight hundred sixty-eight".