255319856 has 40 divisors (see below), whose sum is σ = 544645200. Its totient is φ = 114981120.

The previous prime is 255319847. The next prime is 255319859. The reversal of 255319856 is 658913552.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (255319859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12530 + ... + 25838.

It is an arithmetic number, because the mean of its divisors is an integer number (13616130).

Almost surely, 2^255319856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255319856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272322600).

255319856 is an abundant number, since it is smaller than the sum of its proper divisors (289325344).

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

255319856 is a wasteful number, since it uses less digits than its factorization.

255319856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13437 (or 13431 counting only the distinct ones).

The product of its digits is 324000, while the sum is 44.

The square root of 255319856 is about 15978.7313639100. The cubic root of 255319856 is about 634.3975984605.

The spelling of 255319856 in words is "two hundred fifty-five million, three hundred nineteen thousand, eight hundred fifty-six".