278872625 has 16 divisors (see below), whose sum is σ = 350193792. Its totient is φ = 221713200.

The previous prime is 278872619. The next prime is 278872639. The reversal of 278872625 is 526278872.

It is not a de Polignac number, because 278872625 - 2²⁸ = 10437169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 278872625.

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, 13532 + ... + 27218.

It is an arithmetic number, because the mean of its divisors is an integer number (21887112).

Almost surely, 2^278872625 is an apocalyptic number.

278872625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

278872625 is a deficient number, since it is larger than the sum of its proper divisors (71321167).

278872625 is a wasteful number, since it uses less digits than its factorization.

278872625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13865 (or 13855 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 278872625 is about 16699.4797823166. The cubic root of 278872625 is about 653.3340527955.

The spelling of 278872625 in words is "two hundred seventy-eight million, eight hundred seventy-two thousand, six hundred twenty-five".