255138862 has 32 divisors (see below), whose sum is σ = 437011200. Its totient is φ = 110584320.

The previous prime is 255138857. The next prime is 255138899. The reversal of 255138862 is 268831552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226633 + ... + 227755.

It is an arithmetic number, because the mean of its divisors is an integer number (13656600).

Almost surely, 2^255138862 is an apocalyptic number.

255138862 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

255138862 is a deficient number, since it is larger than the sum of its proper divisors (181872338).

255138862 is a wasteful number, since it uses less digits than its factorization.

255138862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608.

The product of its digits is 115200, while the sum is 40.

The square root of 255138862 is about 15973.0667687830. The cubic root of 255138862 is about 634.2476567318.

The spelling of 255138862 in words is "two hundred fifty-five million, one hundred thirty-eight thousand, eight hundred sixty-two".