256744734 has 8 divisors (see below), whose sum is σ = 513489480. Its totient is φ = 85581576.

The previous prime is 256744711. The next prime is 256744819. The reversal of 256744734 is 437447652.

It is a sphenic number, since it is the product of 3 distinct primes.

256744734 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21395389 + ... + 21395400.

It is an arithmetic number, because the mean of its divisors is an integer number (64186185).

Almost surely, 2^256744734 is an apocalyptic number.

256744734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256744734 is a wasteful number, since it uses less digits than its factorization.

256744734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42790794.

The product of its digits is 564480, while the sum is 42.

The square root of 256744734 is about 16023.2560361495. The cubic root of 256744734 is about 635.5755494364.

The spelling of 256744734 in words is "two hundred fifty-six million, seven hundred forty-four thousand, seven hundred thirty-four".