255481920 has 168 divisors, whose sum is σ = 899623296. Its totient is φ = 66511872.

The previous prime is 255481913. The next prime is 255481979. The reversal of 255481920 is 29184552.

255481920 is a `hidden beast` number, since 2 + 554 + 81 + 9 + 20 = 666.

It is a super-2 number, since 2×255481920² = 130542022893772800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122809 + ... + 124871.

Almost surely, 2^255481920 is an apocalyptic number.

255481920 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 255481920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449811648).

255481920 is an abundant number, since it is smaller than the sum of its proper divisors (644141376).

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

255481920 is a wasteful number, since it uses less digits than its factorization.

255481920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 255481920 is about 15983.8018005730. The cubic root of 255481920 is about 634.5317977980.

The spelling of 255481920 in words is "two hundred fifty-five million, four hundred eighty-one thousand, nine hundred twenty".