255256986 has 8 divisors (see below), whose sum is σ = 510513984. Its totient is φ = 85085660.

The previous prime is 255256973. The next prime is 255257011. The reversal of 255256986 is 689652552.

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

255256986 is an admirable number.

It is a super-2 number, since 2×255256986² = 130312257803608392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21271410 + ... + 21271421.

It is an arithmetic number, because the mean of its divisors is an integer number (63814248).

Almost surely, 2^255256986 is an apocalyptic number.

255256986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

255256986 is a wasteful number, since it uses less digits than its factorization.

255256986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42542836.

The product of its digits is 1296000, while the sum is 48.

The square root of 255256986 is about 15976.7639401726. The cubic root of 255256986 is about 634.3455227990.

The spelling of 255256986 in words is "two hundred fifty-five million, two hundred fifty-six thousand, nine hundred eighty-six".