239772228 has 24 divisors (see below), whose sum is σ = 577516800. Its totient is φ = 77345760.

The previous prime is 239772193. The next prime is 239772287. The reversal of 239772228 is 822277932.

It is a self number, because there is not a number n which added to its sum of digits gives 239772228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321903 + ... + 322646.

It is an arithmetic number, because the mean of its divisors is an integer number (24063200).

Almost surely, 2^239772228 is an apocalyptic number.

It is an amenable number.

239772228 is an abundant number, since it is smaller than the sum of its proper divisors (337744572).

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

239772228 is a wasteful number, since it uses less digits than its factorization.

239772228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644587 (or 644585 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 239772228 is about 15484.5803301220. The cubic root of 239772228 is about 621.2498443646.

The spelling of 239772228 in words is "two hundred thirty-nine million, seven hundred seventy-two thousand, two hundred twenty-eight".