228489624 has 72 divisors (see below), whose sum is σ = 680223180. Its totient is φ = 69236640.

The previous prime is 228489617. The next prime is 228489629. The reversal of 228489624 is 426984822.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×228489624² = 104415016551322752, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 228489624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228489629) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4402 + ... + 21825.

Almost surely, 2^228489624 is an apocalyptic number.

228489624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

228489624 is an abundant number, since it is smaller than the sum of its proper divisors (451733556).

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

228489624 is a wasteful number, since it uses less digits than its factorization.

228489624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26261 (or 26243 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 228489624 is about 15115.8732463593. The cubic root of 228489624 is about 611.3484672062.

The spelling of 228489624 in words is "two hundred twenty-eight million, four hundred eighty-nine thousand, six hundred twenty-four".