79571540 has 24 divisors (see below), whose sum is σ = 167268192. Its totient is φ = 31796640.

The previous prime is 79571539. The next prime is 79571551. The reversal of 79571540 is 4517597.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 79571494 and 79571503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36275 + ... + 38405.

It is an arithmetic number, because the mean of its divisors is an integer number (6969508).

Almost surely, 2^79571540 is an apocalyptic number.

It is an amenable number.

79571540 is an abundant number, since it is smaller than the sum of its proper divisors (87696652).

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

79571540 is a wasteful number, since it uses less digits than its factorization.

79571540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007 (or 4005 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 79571540 is about 8920.2881119390. The cubic root of 79571540 is about 430.1163197122.

The spelling of 79571540 in words is "seventy-nine million, five hundred seventy-one thousand, five hundred forty".