228756428 has 12 divisors (see below), whose sum is σ = 421393560. Its totient is φ = 108358272.

The previous prime is 228756401. The next prime is 228756443. The reversal of 228756428 is 824657822.

228756428 is digitally balanced in base 2 and base 3, because in such bases 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, 1504901 + ... + 1505052.

It is an arithmetic number, because the mean of its divisors is an integer number (35116130).

Almost surely, 2^228756428 is an apocalyptic number.

It is an amenable number.

228756428 is a deficient number, since it is larger than the sum of its proper divisors (192637132).

228756428 is a wasteful number, since it uses less digits than its factorization.

228756428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009976 (or 3009974 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 228756428 is about 15124.6959638863. The cubic root of 228756428 is about 611.5863288759.

The spelling of 228756428 in words is "two hundred twenty-eight million, seven hundred fifty-six thousand, four hundred twenty-eight".