255989405 has 8 divisors (see below), whose sum is σ = 351071232. Its totient is φ = 175535568.

The previous prime is 255989399. The next prime is 255989407. The reversal of 255989405 is 504989552.

255989405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255989405 - 2⁴ = 255989389 is a prime.

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 255989405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255989407) 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, 3656957 + ... + 3657026.

It is an arithmetic number, because the mean of its divisors is an integer number (43883904).

Almost surely, 2^255989405 is an apocalyptic number.

It is an amenable number.

255989405 is a deficient number, since it is larger than the sum of its proper divisors (95081827).

255989405 is an equidigital number, since it uses as much as digits as its factorization.

255989405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313995.

The product of its (nonzero) digits is 648000, while the sum is 47.

The square root of 255989405 is about 15999.6689028242. The cubic root of 255989405 is about 634.9516610236.

The spelling of 255989405 in words is "two hundred fifty-five million, nine hundred eighty-nine thousand, four hundred five".