228217764 has 24 divisors (see below), whose sum is σ = 533137248. Its totient is φ = 75982720.

The previous prime is 228217711. The next prime is 228217771. The reversal of 228217764 is 467712822.

228217764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222 + ... + 21365.

It is an arithmetic number, because the mean of its divisors is an integer number (22214052).

Almost surely, 2^228217764 is an apocalyptic number.

It is an amenable number.

228217764 is an abundant number, since it is smaller than the sum of its proper divisors (304919484).

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

228217764 is a wasteful number, since it uses less digits than its factorization.

228217764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22475 (or 22473 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 228217764 is about 15106.8780361794. The cubic root of 228217764 is about 611.1059074623.

The spelling of 228217764 in words is "two hundred twenty-eight million, two hundred seventeen thousand, seven hundred sixty-four".