255344638 has 16 divisors (see below), whose sum is σ = 398223504. Its totient is φ = 122696640.

The previous prime is 255344633. The next prime is 255344651. The reversal of 255344638 is 836443552.

It is a self number, because there is not a number n which added to its sum of digits gives 255344638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255344633) 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, 17745 + ... + 28732.

It is an arithmetic number, because the mean of its divisors is an integer number (24888969).

Almost surely, 2^255344638 is an apocalyptic number.

255344638 is a deficient number, since it is larger than the sum of its proper divisors (142878866).

255344638 is a wasteful number, since it uses less digits than its factorization.

255344638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46587.

The product of its digits is 345600, while the sum is 40.

The square root of 255344638 is about 15979.5068134157. The cubic root of 255344638 is about 634.4181232157.

The spelling of 255344638 in words is "two hundred fifty-five million, three hundred forty-four thousand, six hundred thirty-eight".