255888720 has 120 divisors (see below), whose sum is σ = 891255456. Its totient is φ = 68231808.

The previous prime is 255888691. The next prime is 255888791. The reversal of 255888720 is 27888552.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12859 + ... + 26021.

Almost surely, 2^255888720 is an apocalyptic number.

255888720 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 255888720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445627728).

255888720 is an abundant number, since it is smaller than the sum of its proper divisors (635366736).

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

255888720 is a wasteful number, since it uses less digits than its factorization.

255888720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13191 (or 13173 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 255888720 is about 15996.5221220114. The cubic root of 255888720 is about 634.8684043339.

The spelling of 255888720 in words is "two hundred fifty-five million, eight hundred eighty-eight thousand, seven hundred twenty".