228564660 has 96 divisors (see below), whose sum is σ = 701084160. Its totient is φ = 55379968.

The previous prime is 228564647. The next prime is 228564697. The reversal of 228564660 is 66465822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25717 + ... + 33443.

It is an arithmetic number, because the mean of its divisors is an integer number (7302960).

Almost surely, 2^228564660 is an apocalyptic number.

228564660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228564660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350542080).

228564660 is an abundant number, since it is smaller than the sum of its proper divisors (472519500).

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

228564660 is a wasteful number, since it uses less digits than its factorization.

228564660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7785 (or 7783 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 228564660 is about 15118.3550692527. The cubic root of 228564660 is about 611.4153821673.

The spelling of 228564660 in words is "two hundred twenty-eight million, five hundred sixty-four thousand, six hundred sixty".