79591540 has 48 divisors (see below), whose sum is σ = 191528064. Its totient is φ = 27216000.

The previous prime is 79591493. The next prime is 79591549. The reversal of 79591540 is 4519597.

It is a junction number, because it is equal to n+sod(n) for n = 79591493 and 79591502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79591549) 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, 97735 + ... + 98545.

It is an arithmetic number, because the mean of its divisors is an integer number (3990168).

Almost surely, 2^79591540 is an apocalyptic number.

79591540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79591540 is an abundant number, since it is smaller than the sum of its proper divisors (111936524).

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

79591540 is a wasteful number, since it uses less digits than its factorization.

79591540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 79591540 is about 8921.4090815297. The cubic root of 79591540 is about 430.1523527201.

The spelling of 79591540 in words is "seventy-nine million, five hundred ninety-one thousand, five hundred forty".