228882690 has 24 divisors (see below), whose sum is σ = 595095228. Its totient is φ = 61035360.

The previous prime is 228882659. The next prime is 228882691. The reversal of 228882690 is 96288822.

It can be written as a sum of positive squares in 2 ways, for example, as 226532601 + 2350089 = 15051^2 + 1533^2 .

It is a super-2 number, since 2×228882690² = 104774571563272200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (228882691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1271481 + ... + 1271660.

Almost surely, 2^228882690 is an apocalyptic number.

228882690 is an abundant number, since it is smaller than the sum of its proper divisors (366212538).

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

228882690 is a wasteful number, since it uses less digits than its factorization.

228882690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543154 (or 2543151 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 228882690 is about 15128.8694223990. The cubic root of 228882690 is about 611.6988297732.

The spelling of 228882690 in words is "two hundred twenty-eight million, eight hundred eighty-two thousand, six hundred ninety".