255311728 has 20 divisors (see below), whose sum is σ = 565333360. Its totient is φ = 109419264.

The previous prime is 255311717. The next prime is 255311743. The reversal of 255311728 is 827113552.

It is a junction number, because it is equal to n+sod(n) for n = 255311693 and 255311702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1139673 + ... + 1139896.

It is an arithmetic number, because the mean of its divisors is an integer number (28266668).

Almost surely, 2^255311728 is an apocalyptic number.

255311728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

255311728 is an abundant number, since it is smaller than the sum of its proper divisors (310021632).

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

255311728 is a wasteful number, since it uses less digits than its factorization.

255311728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279584 (or 2279578 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The square root of 255311728 is about 15978.4770237967. The cubic root of 255311728 is about 634.3908664623.

The spelling of 255311728 in words is "two hundred fifty-five million, three hundred eleven thousand, seven hundred twenty-eight".