228128256 has 120 divisors (see below), whose sum is σ = 680057664. Its totient is φ = 73543680.

The previous prime is 228128207. The next prime is 228128267. The reversal of 228128256 is 652821822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 228128256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142050 + ... + 143646.

Almost surely, 2^228128256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228128256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340028832).

228128256 is an abundant number, since it is smaller than the sum of its proper divisors (451929408).

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

228128256 is a wasteful number, since it uses less digits than its factorization.

228128256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1633 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 228128256 is about 15103.9152539995. The cubic root of 228128256 is about 611.0260042166.

The spelling of 228128256 in words is "two hundred twenty-eight million, one hundred twenty-eight thousand, two hundred fifty-six".