257898 has 16 divisors (see below), whose sum is σ = 526176. Its totient is φ = 84240.

The previous prime is 257893. The next prime is 257903. The reversal of 257898 is 898752.

257898 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (257893) and next prime (257903).

It is a super-2 number, since 2×257898² = 133022756808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257893) by changing a digit.

257898 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (32886).

2²⁵⁷⁸⁹⁸ is an apocalyptic number.

257898 is an abundant number, since it is smaller than the sum of its proper divisors (268278).

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

257898 is a wasteful number, since it uses less digits than its factorization.

257898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its digits is 40320, while the sum is 39.

The square root of 257898 is about 507.8365878902. The cubic root of 257898 is about 63.6525770685.

The spelling of 257898 in words is "two hundred fifty-seven thousand, eight hundred ninety-eight".