77913312 has 48 divisors (see below), whose sum is σ = 216557712. Its totient is φ = 24442880.

The previous prime is 77913299. The next prime is 77913331. The reversal of 77913312 is 21331977.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 22239 + ... + 25502.

It is an arithmetic number, because the mean of its divisors is an integer number (4511619).

Almost surely, 2^77913312 is an apocalyptic number.

It is an amenable number.

77913312 is an abundant number, since it is smaller than the sum of its proper divisors (138644400).

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

77913312 is a wasteful number, since it uses less digits than its factorization.

77913312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47771 (or 47763 counting only the distinct ones).

The product of its digits is 7938, while the sum is 33.

The square root of 77913312 is about 8826.8517603957. The cubic root of 77913312 is about 427.1075239240.

The spelling of 77913312 in words is "seventy-seven million, nine hundred thirteen thousand, three hundred twelve".