228144656 has 20 divisors (see below), whose sum is σ = 442682604. Its totient is φ = 113904000.

The previous prime is 228144617. The next prime is 228144667. The reversal of 228144656 is 656441822.

It can be written as a sum of positive squares in 2 ways, for example, as 172134400 + 56010256 = 13120^2 + 7484^2 .

It is a super-2 number, since 2×228144656² = 104099968122716672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046 + ... + 21386.

Almost surely, 2^228144656 is an apocalyptic number.

It is an amenable number.

228144656 is a deficient number, since it is larger than the sum of its proper divisors (214537948).

228144656 is a wasteful number, since it uses less digits than its factorization.

228144656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21050 (or 21044 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 228144656 is about 15104.4581498311. The cubic root of 228144656 is about 611.0406459603.

The spelling of 228144656 in words is "two hundred twenty-eight million, one hundred forty-four thousand, six hundred fifty-six".