228644290 has 96 divisors (see below), whose sum is σ = 517104000. Its totient is φ = 72334080.

The previous prime is 228644263. The next prime is 228644291. The reversal of 228644290 is 92446822.

It is a super-2 number, since 2×228644290² = 104556422699208200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228644291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 381411 + ... + 382009.

It is an arithmetic number, because the mean of its divisors is an integer number (5386500).

Almost surely, 2^228644290 is an apocalyptic number.

228644290 is an abundant number, since it is smaller than the sum of its proper divisors (288459710).

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

228644290 is a wasteful number, since it uses less digits than its factorization.

228644290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 228644290 is about 15120.9883936203. The cubic root of 228644290 is about 611.4863779108.

The spelling of 228644290 in words is "two hundred twenty-eight million, six hundred forty-four thousand, two hundred ninety".