255535638 has 16 divisors (see below), whose sum is σ = 512718336. Its totient is φ = 84904040.

The previous prime is 255535613. The next prime is 255535673. The reversal of 255535638 is 836535552.

It is a self number, because there is not a number n which added to its sum of digits gives 255535638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66606 + ... + 70337.

It is an arithmetic number, because the mean of its divisors is an integer number (32044896).

Almost surely, 2^255535638 is an apocalyptic number.

255535638 is an abundant number, since it is smaller than the sum of its proper divisors (257182698).

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

255535638 is a wasteful number, since it uses less digits than its factorization.

255535638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137259.

The product of its digits is 540000, while the sum is 42.

The square root of 255535638 is about 15985.4821009565. The cubic root of 255535638 is about 634.5762672076.

The spelling of 255535638 in words is "two hundred fifty-five million, five hundred thirty-five thousand, six hundred thirty-eight".