255857628 has 48 divisors (see below), whose sum is σ = 643972896. Its totient is φ = 78597120.

The previous prime is 255857621. The next prime is 255857639. The reversal of 255857628 is 826758552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255857621) 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 15 ways as a sum of consecutive naturals, for example, 147808 + ... + 149528.

It is an arithmetic number, because the mean of its divisors is an integer number (13416102).

Almost surely, 2^255857628 is an apocalyptic number.

It is an amenable number.

255857628 is an abundant number, since it is smaller than the sum of its proper divisors (388115268).

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

255857628 is a wasteful number, since it uses less digits than its factorization.

255857628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694 (or 2692 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 48.

The square root of 255857628 is about 15995.5502562431. The cubic root of 255857628 is about 634.8426898645.

The spelling of 255857628 in words is "two hundred fifty-five million, eight hundred fifty-seven thousand, six hundred twenty-eight".