256940264 has 16 divisors (see below), whose sum is σ = 550586400. Its totient is φ = 110117232.

The previous prime is 256940239. The next prime is 256940269. The reversal of 256940264 is 462049652.

It is not an unprimeable number, because it can be changed into a prime (256940269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294054 + ... + 2294165.

It is an arithmetic number, because the mean of its divisors is an integer number (34411650).

Almost surely, 2^256940264 is an apocalyptic number.

It is an amenable number.

256940264 is an abundant number, since it is smaller than the sum of its proper divisors (293646136).

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

256940264 is a wasteful number, since it uses less digits than its factorization.

256940264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588232 (or 4588228 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 256940264 is about 16029.3563189543. The cubic root of 256940264 is about 635.7368543385.

The spelling of 256940264 in words is "two hundred fifty-six million, nine hundred forty thousand, two hundred sixty-four".