278056172 has 12 divisors (see below), whose sum is σ = 486724056. Its totient is φ = 138992160.

The previous prime is 278056139. The next prime is 278056193. The reversal of 278056172 is 271650872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16403 + ... + 28725.

It is an arithmetic number, because the mean of its divisors is an integer number (40560338).

Almost surely, 2^278056172 is an apocalyptic number.

It is an amenable number.

278056172 is a deficient number, since it is larger than the sum of its proper divisors (208667884).

278056172 is a wasteful number, since it uses less digits than its factorization.

278056172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17968 (or 17966 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 278056172 is about 16675.0164017910. The cubic root of 278056172 is about 652.6958427221.

The spelling of 278056172 in words is "two hundred seventy-eight million, fifty-six thousand, one hundred seventy-two".