255898639 has 6 divisors (see below), whose sum is σ = 265027880. Its totient is φ = 247073736.

The previous prime is 255898627. The next prime is 255898649. The reversal of 255898639 is 936898552.

It is not a de Polignac number, because 255898639 - 2¹¹ = 255896591 is a prime.

It is a super-2 number, since 2×255898639² = 130968226884104642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255898639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255898649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151299 + ... + 152980.

Almost surely, 2^255898639 is an apocalyptic number.

255898639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

255898639 is a deficient number, since it is larger than the sum of its proper divisors (9129241).

255898639 is an equidigital number, since it uses as much as digits as its factorization.

255898639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304337 (or 304308 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 55.

The square root of 255898639 is about 15996.8321551487. The cubic root of 255898639 is about 634.8766073506.

The spelling of 255898639 in words is "two hundred fifty-five million, eight hundred ninety-eight thousand, six hundred thirty-nine".