256045578 has 32 divisors (see below), whose sum is σ = 518654400. Its totient is φ = 84260736.

The previous prime is 256045571. The next prime is 256045627. The reversal of 256045578 is 875540652.

It is not an unprimeable number, because it can be changed into a prime (256045571) 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 15 ways as a sum of consecutive naturals, for example, 247350 + ... + 248382.

It is an arithmetic number, because the mean of its divisors is an integer number (16207950).

Almost surely, 2^256045578 is an apocalyptic number.

256045578 is an abundant number, since it is smaller than the sum of its proper divisors (262608822).

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

256045578 is a wasteful number, since it uses less digits than its factorization.

256045578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526.

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 256045578 is about 16001.4242491098. The cubic root of 256045578 is about 634.9981011372.

The spelling of 256045578 in words is "two hundred fifty-six million, forty-five thousand, five hundred seventy-eight".