228644664 has 64 divisors (see below), whose sum is σ = 579930240. Its totient is φ = 75116160.

The previous prime is 228644639. The next prime is 228644681. The reversal of 228644664 is 466446822.

228644664 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 825294 + ... + 825570.

It is an arithmetic number, because the mean of its divisors is an integer number (9061410).

Almost surely, 2^228644664 is an apocalyptic number.

228644664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

228644664 is an abundant number, since it is smaller than the sum of its proper divisors (351285576).

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

228644664 is a wasteful number, since it uses less digits than its factorization.

228644664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 656 counting only the distinct ones).

The product of its digits is 442368, while the sum is 42.

The square root of 228644664 is about 15121.0007605317. Note that the first 3 decimals coincide. The cubic root of 228644664 is about 611.4867113192.

The spelling of 228644664 in words is "two hundred twenty-eight million, six hundred forty-four thousand, six hundred sixty-four".