228431956 has 12 divisors (see below), whose sum is σ = 413540820. Its totient is φ = 110277440.

The previous prime is 228431911. The next prime is 228431971. The reversal of 228431956 is 659134822.

228431956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162562500 + 65869456 = 12750^2 + 8116^2 .

It is a congruent number.

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, 984505 + ... + 984736.

It is an arithmetic number, because the mean of its divisors is an integer number (34461735).

Almost surely, 2^228431956 is an apocalyptic number.

It is an amenable number.

228431956 is a deficient number, since it is larger than the sum of its proper divisors (185108864).

228431956 is a wasteful number, since it uses less digits than its factorization.

228431956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969274 (or 1969272 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 228431956 is about 15113.9655947736. The cubic root of 228431956 is about 611.2970305746.

The spelling of 228431956 in words is "two hundred twenty-eight million, four hundred thirty-one thousand, nine hundred fifty-six".