256441256 has 8 divisors (see below), whose sum is σ = 480827370. Its totient is φ = 128220624.

The previous prime is 256441247. The next prime is 256441267. The reversal of 256441256 is 652144652.

It can be written as a sum of positive squares in only one way, i.e., 238208356 + 18232900 = 15434^2 + 4270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16027571 + ... + 16027586.

Almost surely, 2^256441256 is an apocalyptic number.

It is an amenable number.

256441256 is a deficient number, since it is larger than the sum of its proper divisors (224386114).

256441256 is a wasteful number, since it uses less digits than its factorization.

256441256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32055163 (or 32055159 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 256441256 is about 16013.7833131337. The cubic root of 256441256 is about 635.3250292135.

The spelling of 256441256 in words is "two hundred fifty-six million, four hundred forty-one thousand, two hundred fifty-six".