77957912 has 32 divisors (see below), whose sum is σ = 156783600. Its totient is φ = 36226944.

The previous prime is 77957899. The next prime is 77957921. The reversal of 77957912 is 21975977.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3218 + ... + 12894.

Almost surely, 2^77957912 is an apocalyptic number.

It is an amenable number.

77957912 is an abundant number, since it is smaller than the sum of its proper divisors (78825688).

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

77957912 is a wasteful number, since it uses less digits than its factorization.

77957912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9755 (or 9751 counting only the distinct ones).

The product of its digits is 277830, while the sum is 47.

The square root of 77957912 is about 8829.3777810217. The cubic root of 77957912 is about 427.1890049165.

The spelling of 77957912 in words is "seventy-seven million, nine hundred fifty-seven thousand, nine hundred twelve".