255585440 has 48 divisors (see below), whose sum is σ = 658717920. Its totient is φ = 92939520.

The previous prime is 255585437. The next prime is 255585457. The reversal of 255585440 is 44585552.

It is a junction number, because it is equal to n+sod(n) for n = 255585394 and 255585403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70850 + ... + 74369.

It is an arithmetic number, because the mean of its divisors is an integer number (13723290).

Almost surely, 2^255585440 is an apocalyptic number.

255585440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255585440 is an abundant number, since it is smaller than the sum of its proper divisors (403132480).

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

255585440 is a wasteful number, since it uses less digits than its factorization.

255585440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145245 (or 145237 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 38.

The square root of 255585440 is about 15987.0397509983. The cubic root of 255585440 is about 634.6174892652.

The spelling of 255585440 in words is "two hundred fifty-five million, five hundred eighty-five thousand, four hundred forty".