228975220 has 24 divisors (see below), whose sum is σ = 481136544. Its totient is φ = 91535136.

The previous prime is 228975191. The next prime is 228975223. The reversal of 228975220 is 22579822.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 228975220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228975223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54847 + ... + 58873.

It is an arithmetic number, because the mean of its divisors is an integer number (20047356).

Almost surely, 2^228975220 is an apocalyptic number.

228975220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228975220 is an abundant number, since it is smaller than the sum of its proper divisors (252161324).

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

228975220 is a wasteful number, since it uses less digits than its factorization.

228975220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879 (or 6877 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 228975220 is about 15131.9271740251. The cubic root of 228975220 is about 611.7812488021.

The spelling of 228975220 in words is "two hundred twenty-eight million, nine hundred seventy-five thousand, two hundred twenty".