255678720 has 144 divisors (see below), whose sum is σ = 890955072. Its totient is φ = 61972480.

The previous prime is 255678707. The next prime is 255678727. The reversal of 255678720 is 27876552.

It is not an unprimeable number, because it can be changed into a prime (255678727) 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, 39214 + ... + 45266.

It is an arithmetic number, because the mean of its divisors is an integer number (6187188).

Almost surely, 2^255678720 is an apocalyptic number.

255678720 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 255678720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445477536).

255678720 is an abundant number, since it is smaller than the sum of its proper divisors (635276352).

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

255678720 is a wasteful number, since it uses less digits than its factorization.

255678720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088 (or 6074 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 255678720 is about 15989.9568479718. The cubic root of 255678720 is about 634.6946844805.

The spelling of 255678720 in words is "two hundred fifty-five million, six hundred seventy-eight thousand, seven hundred twenty".