77937856 has 28 divisors (see below), whose sum is σ = 155788360. Its totient is φ = 38684160.

The previous prime is 77937841. The next prime is 77937857. The reversal of 77937856 is 65873977.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77937857) 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 3 ways as a sum of consecutive naturals, for example, 4516 + ... + 13276.

It is an arithmetic number, because the mean of its divisors is an integer number (5563870).

Almost surely, 2^77937856 is an apocalyptic number.

It is an amenable number.

77937856 is a deficient number, since it is larger than the sum of its proper divisors (77850504).

77937856 is a wasteful number, since it uses less digits than its factorization.

77937856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912 (or 8902 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 52.

The square root of 77937856 is about 8828.2419540926. The cubic root of 77937856 is about 427.1523678932.

The spelling of 77937856 in words is "seventy-seven million, nine hundred thirty-seven thousand, eight hundred fifty-six".