228123290 has 16 divisors (see below), whose sum is σ = 411187968. Its totient is φ = 91123536.

The previous prime is 228123281. The next prime is 228123331. The reversal of 228123290 is 92321822.

228123290 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, 7922 + ... + 22781.

It is an arithmetic number, because the mean of its divisors is an integer number (25699248).

Almost surely, 2^228123290 is an apocalyptic number.

228123290 is a deficient number, since it is larger than the sum of its proper divisors (183064678).

228123290 is a wasteful number, since it uses less digits than its factorization.

228123290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31453.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 228123290 is about 15103.7508586444. The cubic root of 228123290 is about 611.0215704868.

The spelling of 228123290 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, two hundred ninety".