256244356 has 6 divisors (see below), whose sum is σ = 448427630. Its totient is φ = 128122176.

The previous prime is 256244341. The next prime is 256244369. The reversal of 256244356 is 653442652.

It can be written as a sum of positive squares in only one way, i.e., 254721600 + 1522756 = 15960^2 + 1234^2 .

It is a super-2 number, since 2×256244356² = 131322339963709472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32030541 + ... + 32030548.

Almost surely, 2^256244356 is an apocalyptic number.

It is an amenable number.

256244356 is a deficient number, since it is larger than the sum of its proper divisors (192183274).

256244356 is a wasteful number, since it uses less digits than its factorization.

256244356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64061093 (or 64061091 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The square root of 256244356 is about 16007.6343036690. The cubic root of 256244356 is about 635.1623830898.

The spelling of 256244356 in words is "two hundred fifty-six million, two hundred forty-four thousand, three hundred fifty-six".