255898240 has 64 divisors (see below), whose sum is σ = 658836360. Its totient is φ = 94482432.

The previous prime is 255898231. The next prime is 255898303. The reversal of 255898240 is 42898552.

It can be written as a sum of positive squares in 4 ways, for example, as 149230656 + 106667584 = 12216^2 + 10328^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 7059 + ... + 23698.

Almost surely, 2^255898240 is an apocalyptic number.

255898240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255898240 is an abundant number, since it is smaller than the sum of its proper divisors (402938120).

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

255898240 is a wasteful number, since it uses less digits than its factorization.

255898240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30789 (or 30777 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 255898240 is about 15996.8196839247. The cubic root of 255898240 is about 634.8762773815.

The spelling of 255898240 in words is "two hundred fifty-five million, eight hundred ninety-eight thousand, two hundred forty".