256530460 has 12 divisors (see below), whose sum is σ = 538714008. Its totient is φ = 102612176.

The previous prime is 256530383. The next prime is 256530473. The reversal of 256530460 is 64035652.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6413242 + ... + 6413281.

It is an arithmetic number, because the mean of its divisors is an integer number (44892834).

Almost surely, 2^256530460 is an apocalyptic number.

256530460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256530460 is an abundant number, since it is smaller than the sum of its proper divisors (282183548).

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

256530460 is a wasteful number, since it uses less digits than its factorization.

256530460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826532 (or 12826530 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 256530460 is about 16016.5682966109. The cubic root of 256530460 is about 635.3986873613.

The spelling of 256530460 in words is "two hundred fifty-six million, five hundred thirty thousand, four hundred sixty".