257489458 has 4 divisors (see below), whose sum is σ = 386234190. Its totient is φ = 128744728.

The previous prime is 257489447. The next prime is 257489459. The reversal of 257489458 is 854984752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 151954929 + 105534529 = 12327^2 + 10273^2 .

It is a super-2 number, since 2×257489458² = 132601641962267528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257489459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64372363 + ... + 64372366.

Almost surely, 2^257489458 is an apocalyptic number.

257489458 is a deficient number, since it is larger than the sum of its proper divisors (128744732).

257489458 is a wasteful number, since it uses less digits than its factorization.

257489458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128744731.

The product of its digits is 3225600, while the sum is 52.

The square root of 257489458 is about 16046.4780559474. The cubic root of 257489458 is about 636.1894814698.

The spelling of 257489458 in words is "two hundred fifty-seven million, four hundred eighty-nine thousand, four hundred fifty-eight".