228638224 has 40 divisors (see below), whose sum is σ = 454921280. Its totient is φ = 111259008.

The previous prime is 228638213. The next prime is 228638231. The reversal of 228638224 is 422836822.

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, 301654 + ... + 302410.

It is an arithmetic number, because the mean of its divisors is an integer number (11373032).

Almost surely, 2^228638224 is an apocalyptic number.

It is an amenable number.

228638224 is a deficient number, since it is larger than the sum of its proper divisors (226283056).

228638224 is a wasteful number, since it uses less digits than its factorization.

228638224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1241 counting only the distinct ones).

The product of its digits is 73728, while the sum is 37.

The square root of 228638224 is about 15120.7878101639. The cubic root of 228638224 is about 611.4809702254.

It can be divided in two parts, 22 and 8638224, that added together give a triangular number (8638246 = T₄₁₅₆).

The spelling of 228638224 in words is "two hundred twenty-eight million, six hundred thirty-eight thousand, two hundred twenty-four".