255398685 has 8 divisors (see below), whose sum is σ = 408637920. Its totient is φ = 136212624.

The previous prime is 255398681. The next prime is 255398687. The reversal of 255398685 is 586893552.

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

It is not a de Polignac number, because 255398685 - 2² = 255398681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255398681) 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, 8513275 + ... + 8513304.

It is an arithmetic number, because the mean of its divisors is an integer number (51079740).

Almost surely, 2^255398685 is an apocalyptic number.

It is an amenable number.

255398685 is a deficient number, since it is larger than the sum of its proper divisors (153239235).

255398685 is a wasteful number, since it uses less digits than its factorization.

255398685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17026587.

The product of its digits is 2592000, while the sum is 51.

The square root of 255398685 is about 15981.1978587339. The cubic root of 255398685 is about 634.4628809957.

The spelling of 255398685 in words is "two hundred fifty-five million, three hundred ninety-eight thousand, six hundred eighty-five".