79725870 has 192 divisors, whose sum is σ = 253693440. Its totient is φ = 17635968.

The previous prime is 79725857. The next prime is 79725871. The reversal of 79725870 is 7852797.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79725871) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 731376 + ... + 731484.

It is an arithmetic number, because the mean of its divisors is an integer number (1321320).

Almost surely, 2^79725870 is an apocalyptic number.

79725870 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79725870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126846720).

79725870 is an abundant number, since it is smaller than the sum of its proper divisors (173967570).

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

79725870 is a wasteful number, since it uses less digits than its factorization.

79725870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 79725870 is about 8928.9344269067. The cubic root of 79725870 is about 430.3942121302.

The spelling of 79725870 in words is "seventy-nine million, seven hundred twenty-five thousand, eight hundred seventy".