79770688 has 42 divisors (see below), whose sum is σ = 163692078. Its totient is φ = 38568960.

The previous prime is 79770679. The next prime is 79770689. The reversal of 79770688 is 88607797.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79709184 + 61504 = 8928^2 + 248^2 .

It is not an unprimeable number, because it can be changed into a prime (79770689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60856 + ... + 62152.

Almost surely, 2^79770688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79770688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81846039).

79770688 is an abundant number, since it is smaller than the sum of its proper divisors (83921390).

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

79770688 is a wasteful number, since it uses less digits than its factorization.

79770688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 79770688 is about 8931.4437802631. The cubic root of 79770688 is about 430.4748459086.

The spelling of 79770688 in words is "seventy-nine million, seven hundred seventy thousand, six hundred eighty-eight".