255843638 has 16 divisors (see below), whose sum is σ = 390671424. Its totient is φ = 125626560.

The previous prime is 255843631. The next prime is 255843661. The reversal of 255843638 is 836348552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255843631) 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, 103331 + ... + 105777.

It is an arithmetic number, because the mean of its divisors is an integer number (24416964).

Almost surely, 2^255843638 is an apocalyptic number.

255843638 is a deficient number, since it is larger than the sum of its proper divisors (134827786).

255843638 is a wasteful number, since it uses less digits than its factorization.

255843638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367.

The product of its digits is 691200, while the sum is 44.

The square root of 255843638 is about 15995.1129411455. The cubic root of 255843638 is about 634.8311188316.

The spelling of 255843638 in words is "two hundred fifty-five million, eight hundred forty-three thousand, six hundred thirty-eight".