255491760 has 40 divisors (see below), whose sum is σ = 792025200. Its totient is φ = 68131072.

The previous prime is 255491737. The next prime is 255491773. The reversal of 255491760 is 67194552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 532035 + ... + 532514.

It is an arithmetic number, because the mean of its divisors is an integer number (19800630).

Almost surely, 2^255491760 is an apocalyptic number.

255491760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255491760 is an abundant number, since it is smaller than the sum of its proper divisors (536533440).

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

255491760 is a wasteful number, since it uses less digits than its factorization.

255491760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064565 (or 1064559 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 255491760 is about 15984.1096092338. The cubic root of 255491760 is about 634.5399441184.

The spelling of 255491760 in words is "two hundred fifty-five million, four hundred ninety-one thousand, seven hundred sixty".