79572780 has 144 divisors (see below), whose sum is σ = 286191360. Its totient is φ = 18180288.

The previous prime is 79572763. The next prime is 79572791. The reversal of 79572780 is 8727597.

79572780 is a `hidden beast` number, since 7 + 9 + 572 + 78 + 0 = 666.

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

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, 32851 + ... + 35189.

It is an arithmetic number, because the mean of its divisors is an integer number (1987440).

Almost surely, 2^79572780 is an apocalyptic number.

79572780 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 79572780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143095680).

79572780 is an abundant number, since it is smaller than the sum of its proper divisors (206618580).

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

79572780 is a wasteful number, since it uses less digits than its factorization.

79572780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370 (or 2356 counting only the distinct ones).

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

The square root of 79572780 is about 8920.3576161497. The cubic root of 79572780 is about 430.1185539343.

The spelling of 79572780 in words is "seventy-nine million, five hundred seventy-two thousand, seven hundred eighty".