255638942 has 8 divisors (see below), whose sum is σ = 412955256. Its totient is φ = 117987192.

The previous prime is 255638897. The next prime is 255638959. The reversal of 255638942 is 249836552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 255638893 and 255638902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4916108 + ... + 4916159.

It is an arithmetic number, because the mean of its divisors is an integer number (51619407).

Almost surely, 2^255638942 is an apocalyptic number.

255638942 is a deficient number, since it is larger than the sum of its proper divisors (157316314).

255638942 is a wasteful number, since it uses less digits than its factorization.

255638942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9832282.

The product of its digits is 518400, while the sum is 44.

The square root of 255638942 is about 15988.7129563327. The cubic root of 255638942 is about 634.6617679169.

The spelling of 255638942 in words is "two hundred fifty-five million, six hundred thirty-eight thousand, nine hundred forty-two".