255438686 has 8 divisors (see below), whose sum is σ = 385599000. Its totient is φ = 126905688.

The previous prime is 255438683. The next prime is 255438707. The reversal of 255438686 is 686834552.

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

It is a self number, because there is not a number n which added to its sum of digits gives 255438686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255438683) 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 3 ways as a sum of consecutive naturals, for example, 406436 + ... + 407063.

It is an arithmetic number, because the mean of its divisors is an integer number (48199875).

Almost surely, 2^255438686 is an apocalyptic number.

255438686 is a deficient number, since it is larger than the sum of its proper divisors (130160314).

255438686 is a wasteful number, since it uses less digits than its factorization.

255438686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813658.

The product of its digits is 1382400, while the sum is 47.

The square root of 255438686 is about 15982.4493116668. The cubic root of 255438686 is about 634.4960028379.

The spelling of 255438686 in words is "two hundred fifty-five million, four hundred thirty-eight thousand, six hundred eighty-six".