256698 has 24 divisors (see below), whose sum is σ = 599508. Its totient is φ = 78912.

The previous prime is 256687. The next prime is 256699. The reversal of 256698 is 896652.

256698 is a `hidden beast` number, since 2 + 566 + 98 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 23409 = 483^2 + 153^2 .

It is a Curzon number.

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256698.

It is not an unprimeable number, because it can be changed into a prime (256699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315 + ... + 782.

2²⁵⁶⁶⁹⁸ is an apocalyptic number.

256698 is an abundant number, since it is smaller than the sum of its proper divisors (342810).

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

256698 is a wasteful number, since it uses less digits than its factorization.

256698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1115 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 256698 is about 506.6537279050. The cubic root of 256698 is about 63.5536983517.

The spelling of 256698 in words is "two hundred fifty-six thousand, six hundred ninety-eight".