228400772 has 12 divisors (see below), whose sum is σ = 401222976. Its totient is φ = 113765640.

The previous prime is 228400751. The next prime is 228400807. The reversal of 228400772 is 277004822.

It is a happy number.

228400772 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 3 ways as a sum of consecutive naturals, for example, 107504 + ... + 109607.

It is an arithmetic number, because the mean of its divisors is an integer number (33435248).

Almost surely, 2^228400772 is an apocalyptic number.

It is an amenable number.

228400772 is a deficient number, since it is larger than the sum of its proper divisors (172822204).

228400772 is a wasteful number, since it uses less digits than its factorization.

228400772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217378 (or 217376 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 228400772 is about 15112.9339309083. The cubic root of 228400772 is about 611.2692125839.

The spelling of 228400772 in words is "two hundred twenty-eight million, four hundred thousand, seven hundred seventy-two".