79959540 has 48 divisors (see below), whose sum is σ = 231114240. Its totient is φ = 20634240.

The previous prime is 79959533. The next prime is 79959541. The reversal of 79959540 is 4595997.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 79959540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79959541) 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, 19635 + ... + 23354.

It is an arithmetic number, because the mean of its divisors is an integer number (4814880).

Almost surely, 2^79959540 is an apocalyptic number.

It is an amenable number.

79959540 is an abundant number, since it is smaller than the sum of its proper divisors (151154700).

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

79959540 is a wasteful number, since it uses less digits than its factorization.

79959540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43032 (or 43030 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 79959540 is about 8942.0098411934. The cubic root of 79959540 is about 430.8142854007.

The spelling of 79959540 in words is "seventy-nine million, nine hundred fifty-nine thousand, five hundred forty".