79500540 has 96 divisors (see below), whose sum is σ = 259660800. Its totient is φ = 18166848.

The previous prime is 79500527. The next prime is 79500557. The reversal of 79500540 is 4500597.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 79500498 and 79500507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18649 + ... + 22511.

It is an arithmetic number, because the mean of its divisors is an integer number (2704800).

Almost surely, 2^79500540 is an apocalyptic number.

79500540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79500540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129830400).

79500540 is an abundant number, since it is smaller than the sum of its proper divisors (180160260).

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

79500540 is a wasteful number, since it uses less digits than its factorization.

79500540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896 (or 3880 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 79500540 is about 8916.3075317084. The cubic root of 79500540 is about 429.9883537498.

The spelling of 79500540 in words is "seventy-nine million, five hundred thousand, five hundred forty".