256898580 has 24 divisors (see below), whose sum is σ = 719316192. Its totient is φ = 68506272.

The previous prime is 256898573. The next prime is 256898597. The reversal of 256898580 is 85898652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140762 + ... + 2140881.

It is an arithmetic number, because the mean of its divisors is an integer number (29971508).

Almost surely, 2^256898580 is an apocalyptic number.

256898580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256898580 is an abundant number, since it is smaller than the sum of its proper divisors (462417612).

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

256898580 is a wasteful number, since it uses less digits than its factorization.

256898580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281655 (or 4281653 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 51.

The square root of 256898580 is about 16028.0560268549. The cubic root of 256898580 is about 635.7024734701.

The spelling of 256898580 in words is "two hundred fifty-six million, eight hundred ninety-eight thousand, five hundred eighty".