256341560 has 32 divisors (see below), whose sum is σ = 578145600. Its totient is φ = 102291840.

The previous prime is 256341557. The next prime is 256341571. The reversal of 256341560 is 65143652.

It is a super-3 number, since 3×256341560³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9806 + ... + 24674.

It is an arithmetic number, because the mean of its divisors is an integer number (18067050).

Almost surely, 2^256341560 is an apocalyptic number.

256341560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256341560 is an abundant number, since it is smaller than the sum of its proper divisors (321804040).

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

256341560 is a wasteful number, since it uses less digits than its factorization.

256341560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15311 (or 15307 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 256341560 is about 16010.6701920938. The cubic root of 256341560 is about 635.2426873223.

The spelling of 256341560 in words is "two hundred fifty-six million, three hundred forty-one thousand, five hundred sixty".