228243664 has 20 divisors (see below), whose sum is σ = 482424480. Its totient is φ = 103747040.

The previous prime is 228243643. The next prime is 228243667. The reversal of 228243664 is 466342822.

228243664 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 super-2 number, since 2×228243664² = 104190340312289792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228243667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648244 + ... + 648595.

It is an arithmetic number, because the mean of its divisors is an integer number (24121224).

Almost surely, 2^228243664 is an apocalyptic number.

It is an amenable number.

228243664 is an abundant number, since it is smaller than the sum of its proper divisors (254180816).

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

228243664 is a wasteful number, since it uses less digits than its factorization.

228243664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296858 (or 1296852 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 228243664 is about 15107.7352372882. The cubic root of 228243664 is about 611.1290243369.

The spelling of 228243664 in words is "two hundred twenty-eight million, two hundred forty-three thousand, six hundred sixty-four".