255591280 has 80 divisors (see below), whose sum is σ = 701097984. Its totient is φ = 84798720.

The previous prime is 255591233. The next prime is 255591289. The reversal of 255591280 is 82195552.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255591289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9999 + ... + 24721.

Almost surely, 2^255591280 is an apocalyptic number.

255591280 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 255591280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350548992).

255591280 is an abundant number, since it is smaller than the sum of its proper divisors (445506704).

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

255591280 is a wasteful number, since it uses less digits than its factorization.

255591280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14774 (or 14768 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 255591280 is about 15987.2223979026. Note that the first 3 decimals coincide. The cubic root of 255591280 is about 634.6223227929.

The spelling of 255591280 in words is "two hundred fifty-five million, five hundred ninety-one thousand, two hundred eighty".