256464228 has 12 divisors (see below), whose sum is σ = 598416560. Its totient is φ = 85488072.

The previous prime is 256464211. The next prime is 256464233. The reversal of 256464228 is 822464652.

256464228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 10685998 + ... + 10686021.

Almost surely, 2^256464228 is an apocalyptic number.

It is an amenable number.

256464228 is an abundant number, since it is smaller than the sum of its proper divisors (341952332).

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

256464228 is a wasteful number, since it uses less digits than its factorization.

256464228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21372026 (or 21372024 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The square root of 256464228 is about 16014.5005541853. The cubic root of 256464228 is about 635.3439994461.

The spelling of 256464228 in words is "two hundred fifty-six million, four hundred sixty-four thousand, two hundred twenty-eight".