79640506 has 24 divisors (see below), whose sum is σ = 132072192. Its totient is φ = 35989800.

The previous prime is 79640497. The next prime is 79640521. The reversal of 79640506 is 60504697.

It is a super-2 number, since 2×79640506² = 12685220391872072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45361 + ... + 47083.

It is an arithmetic number, because the mean of its divisors is an integer number (5503008).

Almost surely, 2^79640506 is an apocalyptic number.

79640506 is a deficient number, since it is larger than the sum of its proper divisors (52431686).

79640506 is a wasteful number, since it uses less digits than its factorization.

79640506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 79640506 is about 8924.1529570038. The cubic root of 79640506 is about 430.2405468597.

The spelling of 79640506 in words is "seventy-nine million, six hundred forty thousand, five hundred six".