228372865 has 32 divisors (see below), whose sum is σ = 328458240. Its totient is φ = 149037504.

The previous prime is 228372863. The next prime is 228372889. The reversal of 228372865 is 568273822.

It is not a de Polignac number, because 228372865 - 2¹ = 228372863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228372863) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 191802 + ... + 192988.

It is an arithmetic number, because the mean of its divisors is an integer number (10264320).

Almost surely, 2^228372865 is an apocalyptic number.

It is an amenable number.

228372865 is a deficient number, since it is larger than the sum of its proper divisors (100085375).

228372865 is a wasteful number, since it uses less digits than its factorization.

228372865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461.

The product of its digits is 322560, while the sum is 43.

The square root of 228372865 is about 15112.0106206951. The cubic root of 228372865 is about 611.2443157259.

The spelling of 228372865 in words is "two hundred twenty-eight million, three hundred seventy-two thousand, eight hundred sixty-five".