278876678872 has 32 divisors (see below), whose sum is σ = 570459985920. Its totient is φ = 126755367840.

The previous prime is 278876678819. The next prime is 278876678909.

278876678872 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×278876678872² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1817113 + ... + 1964599.

It is an arithmetic number, because the mean of its divisors is an integer number (17826874560).

Almost surely, 2^278876678872 is an apocalyptic number.

278876678872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

278876678872 is an abundant number, since it is smaller than the sum of its proper divisors (291583307048).

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

278876678872 is a wasteful number, since it uses less digits than its factorization.

278876678872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168991 (or 168987 counting only the distinct ones).

The product of its digits is 1416167424, while the sum is 76.

The spelling of 278876678872 in words is "two hundred seventy-eight billion, eight hundred seventy-six million, six hundred seventy-eight thousand, eight hundred seventy-two".