256058578 has 4 divisors (see below), whose sum is σ = 384087870. Its totient is φ = 128029288.

The previous prime is 256058531. The next prime is 256058591. The reversal of 256058578 is 875850652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 128210329 + 127848249 = 11323^2 + 11307^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 64014643 + ... + 64014646.

Almost surely, 2^256058578 is an apocalyptic number.

256058578 is a deficient number, since it is larger than the sum of its proper divisors (128029292).

256058578 is a wasteful number, since it uses less digits than its factorization.

256058578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128029291.

The product of its (nonzero) digits is 672000, while the sum is 46.

The square root of 256058578 is about 16001.8304577945. The cubic root of 256058578 is about 635.0088477077.

The spelling of 256058578 in words is "two hundred fifty-six million, fifty-eight thousand, five hundred seventy-eight".