79281864 has 96 divisors (see below), whose sum is σ = 222899040. Its totient is φ = 25440000.

The previous prime is 79281859. The next prime is 79281871. The reversal of 79281864 is 46818297.

It is a super-2 number, since 2×79281864² = 12571227918628992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315739 + ... + 315989.

It is an arithmetic number, because the mean of its divisors is an integer number (2321865).

Almost surely, 2^79281864 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 79281864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111449520).

79281864 is an abundant number, since it is smaller than the sum of its proper divisors (143617176).

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

79281864 is a wasteful number, since it uses less digits than its factorization.

79281864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 404 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 79281864 is about 8904.0363880658. The cubic root of 79281864 is about 429.5937464629.

The spelling of 79281864 in words is "seventy-nine million, two hundred eighty-one thousand, eight hundred sixty-four".