79868520 has 96 divisors (see below), whose sum is σ = 263900520. Its totient is φ = 20943360.

The previous prime is 79868491. The next prime is 79868527. The reversal of 79868520 is 2586897.

It can be written as a sum of positive squares in 4 ways, for example, as 17994564 + 61873956 = 4242^2 + 7866^2 .

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

It is not an unprimeable number, because it can be changed into a prime (79868527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20142 + ... + 23778.

Almost surely, 2^79868520 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 79868520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131950260).

79868520 is an abundant number, since it is smaller than the sum of its proper divisors (184032000).

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

79868520 is a wasteful number, since it uses less digits than its factorization.

79868520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715 (or 3708 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 79868520 is about 8936.9189321600. The cubic root of 79868520 is about 430.6507543423.

The spelling of 79868520 in words is "seventy-nine million, eight hundred sixty-eight thousand, five hundred twenty".