256223028 has 12 divisors (see below), whose sum is σ = 597853760. Its totient is φ = 85407672.

The previous prime is 256222979. The next prime is 256223069. The reversal of 256223028 is 820322652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256222986 and 256223004.

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, 10675948 + ... + 10675971.

Almost surely, 2^256223028 is an apocalyptic number.

It is an amenable number.

256223028 is an abundant number, since it is smaller than the sum of its proper divisors (341630732).

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

256223028 is a wasteful number, since it uses less digits than its factorization.

256223028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21351926 (or 21351924 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 256223028 is about 16006.9681076711. The cubic root of 256223028 is about 635.1447604328.

The spelling of 256223028 in words is "two hundred fifty-six million, two hundred twenty-three thousand, twenty-eight".