255258840 has 32 divisors (see below), whose sum is σ = 765776880. Its totient is φ = 68068992.

The previous prime is 255258821. The next prime is 255258847. The reversal of 255258840 is 48852552.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255258847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063459 + ... + 1063698.

Almost surely, 2^255258840 is an apocalyptic number.

255258840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255258840 is an abundant number, since it is smaller than the sum of its proper divisors (510518040).

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

255258840 is a wasteful number, since it uses less digits than its factorization.

255258840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127171 (or 2127167 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 39.

The square root of 255258840 is about 15976.8219618296. The cubic root of 255258840 is about 634.3470586025.

The spelling of 255258840 in words is "two hundred fifty-five million, two hundred fifty-eight thousand, eight hundred forty".