279789987972 has 48 divisors (see below), whose sum is σ = 714963961152. Its totient is φ = 84454932480.

The previous prime is 279789987931. The next prime is 279789987989.

It is a happy number.

279789987972 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4089853 + ... + 4157700.

It is an arithmetic number, because the mean of its divisors is an integer number (14895082524).

Almost surely, 2^279789987972 is an apocalyptic number.

279789987972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

279789987972 is an abundant number, since it is smaller than the sum of its proper divisors (435173973180).

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

279789987972 is a wasteful number, since it uses less digits than its factorization.

279789987972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8247828 (or 8247826 counting only the distinct ones).

The product of its digits is 4032758016, while the sum is 84.

The spelling of 279789987972 in words is "two hundred seventy-nine billion, seven hundred eighty-nine million, nine hundred eighty-seven thousand, nine hundred seventy-two".