79587540 has 144 divisors (see below), whose sum is σ = 264176640. Its totient is φ = 19307520.

The previous prime is 79587527. The next prime is 79587553. The reversal of 79587540 is 4578597.

It is an interprime number because it is at equal distance from previous prime (79587527) and next prime (79587553).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94441 + ... + 95279.

It is an arithmetic number, because the mean of its divisors is an integer number (1834560).

Almost surely, 2^79587540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79587540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132088320).

79587540 is an abundant number, since it is smaller than the sum of its proper divisors (184589100).

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

79587540 is a wasteful number, since it uses less digits than its factorization.

79587540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 79587540 is about 8921.1848988797. The cubic root of 79587540 is about 430.1451466014.

The spelling of 79587540 in words is "seventy-nine million, five hundred eighty-seven thousand, five hundred forty".