255286638 has 12 divisors (see below), whose sum is σ = 553121088. Its totient is φ = 85095540.

The previous prime is 255286631. The next prime is 255286663. The reversal of 255286638 is 836682552.

255286638 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 8 + 6 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 255286593 and 255286602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255286631) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7091278 + ... + 7091313.

It is an arithmetic number, because the mean of its divisors is an integer number (46093424).

Almost surely, 2^255286638 is an apocalyptic number.

255286638 is an abundant number, since it is smaller than the sum of its proper divisors (297834450).

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

255286638 is a wasteful number, since it uses less digits than its factorization.

255286638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14182599 (or 14182596 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 255286638 is about 15977.6918858764. The cubic root of 255286638 is about 634.3700848236.

The spelling of 255286638 in words is "two hundred fifty-five million, two hundred eighty-six thousand, six hundred thirty-eight".