256919826 has 16 divisors (see below), whose sum is σ = 519138144. Its totient is φ = 84756864.

The previous prime is 256919809. The next prime is 256919911. The reversal of 256919826 is 628919652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220140 + ... + 221303.

It is an arithmetic number, because the mean of its divisors is an integer number (32446134).

Almost surely, 2^256919826 is an apocalyptic number.

256919826 is an abundant number, since it is smaller than the sum of its proper divisors (262218318).

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

256919826 is a wasteful number, since it uses less digits than its factorization.

256919826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441545.

The product of its digits is 466560, while the sum is 48.

The square root of 256919826 is about 16028.7187884746. The cubic root of 256919826 is about 635.7199975873.

The spelling of 256919826 in words is "two hundred fifty-six million, nine hundred nineteen thousand, eight hundred twenty-six".