77964816 has 40 divisors (see below), whose sum is σ = 204254784. Its totient is φ = 25621120.

The previous prime is 77964797. The next prime is 77964841. The reversal of 77964816 is 61846977.

It is a super-3 number, since 3×77964816³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 8031 + ... + 14846.

Almost surely, 2^77964816 is an apocalyptic number.

It is an amenable number.

77964816 is an abundant number, since it is smaller than the sum of its proper divisors (126289968).

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

77964816 is a wasteful number, since it uses less digits than its factorization.

77964816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22959 (or 22953 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 77964816 is about 8829.7687398935. The cubic root of 77964816 is about 427.2016152501.

The spelling of 77964816 in words is "seventy-seven million, nine hundred sixty-four thousand, eight hundred sixteen".