257117338 has 4 divisors (see below), whose sum is σ = 385676010. Its totient is φ = 128558668.

The previous prime is 257117297. The next prime is 257117347. The reversal of 257117338 is 833711752.

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., 256544289 + 573049 = 16017^2 + 757^2 .

It is a super-2 number, since 2×257117338² = 132218651000412488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257117297 and 257117306.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64279333 + ... + 64279336.

Almost surely, 2^257117338 is an apocalyptic number.

257117338 is a deficient number, since it is larger than the sum of its proper divisors (128558672).

257117338 is a wasteful number, since it uses less digits than its factorization.

257117338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128558671.

The product of its digits is 35280, while the sum is 37.

The square root of 257117338 is about 16034.8787959248. The cubic root of 257117338 is about 635.8828631366.

The spelling of 257117338 in words is "two hundred fifty-seven million, one hundred seventeen thousand, three hundred thirty-eight".