256745244 has 24 divisors (see below), whose sum is σ = 684654208. Its totient is φ = 73355760.

The previous prime is 256745243. The next prime is 256745267. The reversal of 256745244 is 442547652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256745243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1528162 + ... + 1528329.

Almost surely, 2^256745244 is an apocalyptic number.

It is an amenable number.

256745244 is an abundant number, since it is smaller than the sum of its proper divisors (427908964).

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

256745244 is a wasteful number, since it uses less digits than its factorization.

256745244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056505 (or 3056503 counting only the distinct ones).

The product of its digits is 268800, while the sum is 39.

The square root of 256745244 is about 16023.2719505100. The cubic root of 256745244 is about 635.5759702737.

The spelling of 256745244 in words is "two hundred fifty-six million, seven hundred forty-five thousand, two hundred forty-four".