79640115 has 32 divisors (see below), whose sum is σ = 135482880. Its totient is φ = 39833856.

The previous prime is 79640111. The next prime is 79640117. The reversal of 79640115 is 51104697.

It is not a de Polignac number, because 79640115 - 2² = 79640111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79640111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27999 + ... + 30711.

It is an arithmetic number, because the mean of its divisors is an integer number (4233840).

Almost surely, 2^79640115 is an apocalyptic number.

79640115 is a deficient number, since it is larger than the sum of its proper divisors (55842765).

79640115 is a wasteful number, since it uses less digits than its factorization.

79640115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 79640115 is about 8924.1310501359. The cubic root of 79640115 is about 430.2398427610.

The spelling of 79640115 in words is "seventy-nine million, six hundred forty thousand, one hundred fifteen".