77313864 has 32 divisors (see below), whose sum is σ = 198001440. Its totient is φ = 25142400.

The previous prime is 77313857. The next prime is 77313883. The reversal of 77313864 is 46831377.

It is a super-2 number, since 2×77313864² = 11954867133220992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38302 + ... + 40269.

It is an arithmetic number, because the mean of its divisors is an integer number (6187545).

Almost surely, 2^77313864 is an apocalyptic number.

It is an amenable number.

77313864 is an abundant number, since it is smaller than the sum of its proper divisors (120687576).

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

77313864 is a wasteful number, since it uses less digits than its factorization.

77313864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78621 (or 78617 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 77313864 is about 8792.8302610707. The cubic root of 77313864 is about 426.0093453834.

The spelling of 77313864 in words is "seventy-seven million, three hundred thirteen thousand, eight hundred sixty-four".