257930 has 8 divisors (see below), whose sum is σ = 464292. Its totient is φ = 103168.

The previous prime is 257921. The next prime is 257947. The reversal of 257930 is 39752.

It can be written as a sum of positive squares in 2 ways, for example, as 231361 + 26569 = 481^2 + 163^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 257930.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12887 + ... + 12906.

2²⁵⁷⁹³⁰ is an apocalyptic number.

257930 is a deficient number, since it is larger than the sum of its proper divisors (206362).

257930 is a wasteful number, since it uses less digits than its factorization.

257930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25800.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 257930 is about 507.8680931108. The cubic root of 257930 is about 63.6552096315.

The spelling of 257930 in words is "two hundred fifty-seven thousand, nine hundred thirty".