79987758 has 32 divisors (see below), whose sum is σ = 170087040. Its totient is φ = 25005600.

The previous prime is 79987757. The next prime is 79987769. The reversal of 79987758 is 85778997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79987751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8041 + ... + 14987.

It is an arithmetic number, because the mean of its divisors is an integer number (5315220).

Almost surely, 2^79987758 is an apocalyptic number.

79987758 is an abundant number, since it is smaller than the sum of its proper divisors (90099282).

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

79987758 is a wasteful number, since it uses less digits than its factorization.

79987758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7072.

The product of its digits is 8890560, while the sum is 60.

The square root of 79987758 is about 8943.5875352120. The cubic root of 79987758 is about 430.8649580606.

The spelling of 79987758 in words is "seventy-nine million, nine hundred eighty-seven thousand, seven hundred fifty-eight".