228821544 has 64 divisors (see below), whose sum is σ = 726422400. Its totient is φ = 65377152.

The previous prime is 228821507. The next prime is 228821591. The reversal of 228821544 is 445128822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 228821499 and 228821508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74157 + ... + 77180.

It is an arithmetic number, because the mean of its divisors is an integer number (11350350).

Almost surely, 2^228821544 is an apocalyptic number.

228821544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

228821544 is an abundant number, since it is smaller than the sum of its proper divisors (497600856).

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

228821544 is a wasteful number, since it uses less digits than its factorization.

228821544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151359 (or 151349 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 228821544 is about 15126.8484490326. The cubic root of 228821544 is about 611.6443531504.

It can be divided in two parts, 2288 and 21544, that added together give a palindrome (23832).

The spelling of 228821544 in words is "two hundred twenty-eight million, eight hundred twenty-one thousand, five hundred forty-four".