255278320 has 80 divisors (see below), whose sum is σ = 650529792. Its totient is φ = 92391680.

The previous prime is 255278267. The next prime is 255278323. The reversal of 255278320 is 23872552.

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 (255278323) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 230889 + ... + 231991.

Almost surely, 2^255278320 is an apocalyptic number.

255278320 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 255278320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325264896).

255278320 is an abundant number, since it is smaller than the sum of its proper divisors (395251472).

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

255278320 is a wasteful number, since it uses less digits than its factorization.

255278320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 255278320 is about 15977.4315833303. The cubic root of 255278320 is about 634.3631948591.

The spelling of 255278320 in words is "two hundred fifty-five million, two hundred seventy-eight thousand, three hundred twenty".