255695388 has 96 divisors (see below), whose sum is σ = 680951040. Its totient is φ = 74027520.

The previous prime is 255695359. The next prime is 255695389. The reversal of 255695388 is 883596552.

It is a self number, because there is not a number n which added to its sum of digits gives 255695388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255695389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 832731 + ... + 833037.

It is an arithmetic number, because the mean of its divisors is an integer number (7093240).

Almost surely, 2^255695388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255695388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340475520).

255695388 is an abundant number, since it is smaller than the sum of its proper divisors (425255652).

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

255695388 is a wasteful number, since it uses less digits than its factorization.

255695388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 625 counting only the distinct ones).

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

The square root of 255695388 is about 15990.4780416347. The cubic root of 255695388 is about 634.7084763481.

The spelling of 255695388 in words is "two hundred fifty-five million, six hundred ninety-five thousand, three hundred eighty-eight".