255520760 has 64 divisors (see below), whose sum is σ = 635212800. Its totient is φ = 91728000.

The previous prime is 255520757. The next prime is 255520801. The reversal of 255520760 is 67025552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31085 + ... + 38435.

It is an arithmetic number, because the mean of its divisors is an integer number (9925200).

Almost surely, 2^255520760 is an apocalyptic number.

255520760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255520760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317606400).

255520760 is an abundant number, since it is smaller than the sum of its proper divisors (379692040).

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

255520760 is a wasteful number, since it uses less digits than its factorization.

255520760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452 (or 7448 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 255520760 is about 15985.0167344298. The cubic root of 255520760 is about 634.5639513665.

The spelling of 255520760 in words is "two hundred fifty-five million, five hundred twenty thousand, seven hundred sixty".