228872644 has 72 divisors (see below), whose sum is σ = 540848448. Its totient is φ = 82293120.

The previous prime is 228872629. The next prime is 228872729. The reversal of 228872644 is 446278822.

It is a super-3 number, since 3×228872644³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228872644.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49854 + ... + 54250.

It is an arithmetic number, because the mean of its divisors is an integer number (7511784).

Almost surely, 2^228872644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228872644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270424224).

228872644 is an abundant number, since it is smaller than the sum of its proper divisors (311975804).

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

228872644 is a wasteful number, since it uses less digits than its factorization.

228872644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445 (or 4430 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 228872644 is about 15128.5374045213. The cubic root of 228872644 is about 611.6898801866.

The spelling of 228872644 in words is "two hundred twenty-eight million, eight hundred seventy-two thousand, six hundred forty-four".