77297712 has 20 divisors (see below), whose sum is σ = 199685880. Its totient is φ = 25765888.

The previous prime is 77297711. The next prime is 77297713. The reversal of 77297712 is 21779277.

It is an interprime number because it is at equal distance from previous prime (77297711) and next prime (77297713).

It is not an unprimeable number, because it can be changed into a prime (77297711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805137 + ... + 805232.

It is an arithmetic number, because the mean of its divisors is an integer number (9984294).

Almost surely, 2^77297712 is an apocalyptic number.

It is an amenable number.

77297712 is an abundant number, since it is smaller than the sum of its proper divisors (122388168).

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

77297712 is a wasteful number, since it uses less digits than its factorization.

77297712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610380 (or 1610374 counting only the distinct ones).

The product of its digits is 86436, while the sum is 42.

The square root of 77297712 is about 8791.9117375006. The cubic root of 77297712 is about 425.9796767840.

The spelling of 77297712 in words is "seventy-seven million, two hundred ninety-seven thousand, seven hundred twelve".