256289284 has 6 divisors (see below), whose sum is σ = 448506254. Its totient is φ = 128144640.

The previous prime is 256289279. The next prime is 256289321. The reversal of 256289284 is 482982652.

It can be written as a sum of positive squares in only one way, i.e., 250335684 + 5953600 = 15822^2 + 2440^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32036157 + ... + 32036164.

Almost surely, 2^256289284 is an apocalyptic number.

It is an amenable number.

256289284 is a deficient number, since it is larger than the sum of its proper divisors (192216970).

256289284 is a wasteful number, since it uses less digits than its factorization.

256289284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64072325 (or 64072323 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The square root of 256289284 is about 16009.0375725713. The cubic root of 256289284 is about 635.1995024868.

The spelling of 256289284 in words is "two hundred fifty-six million, two hundred eighty-nine thousand, two hundred eighty-four".