77276816 has 20 divisors (see below), whose sum is σ = 150314412. Its totient is φ = 38486016.

The previous prime is 77276807. The next prime is 77276821. The reversal of 77276816 is 61867277.

It can be written as a sum of positive squares in 2 ways, for example, as 68890000 + 8386816 = 8300^2 + 2896^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5285 + ... + 13508.

Almost surely, 2^77276816 is an apocalyptic number.

It is an amenable number.

77276816 is a deficient number, since it is larger than the sum of its proper divisors (73037596).

77276816 is a wasteful number, since it uses less digits than its factorization.

77276816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19058 (or 19052 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The square root of 77276816 is about 8790.7232921984. The cubic root of 77276816 is about 425.9412880947.

The spelling of 77276816 in words is "seventy-seven million, two hundred seventy-six thousand, eight hundred sixteen".