255804138 has 24 divisors (see below), whose sum is σ = 555766848. Its totient is φ = 85033512.

The previous prime is 255804121. The next prime is 255804139. The reversal of 255804138 is 831408552.

It is a happy number.

255804138 is a `hidden beast` number, since 2 + 5 + 580 + 41 + 38 = 666.

255804138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (255804139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12756 + ... + 25967.

It is an arithmetic number, because the mean of its divisors is an integer number (23156952).

Almost surely, 2^255804138 is an apocalyptic number.

255804138 is an abundant number, since it is smaller than the sum of its proper divisors (299962710).

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

255804138 is a wasteful number, since it uses less digits than its factorization.

255804138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39098 (or 39095 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 255804138 is about 15993.8781413390. The cubic root of 255804138 is about 634.7984463759.

The spelling of 255804138 in words is "two hundred fifty-five million, eight hundred four thousand, one hundred thirty-eight".