257477338 has 4 divisors (see below), whose sum is σ = 386216010. Its totient is φ = 128738668.

The previous prime is 257477333. The next prime is 257477377. The reversal of 257477338 is 833774752.

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., 189530289 + 67947049 = 13767^2 + 8243^2 .

It is not an unprimeable number, because it can be changed into a prime (257477333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64369333 + ... + 64369336.

Almost surely, 2^257477338 is an apocalyptic number.

257477338 is a deficient number, since it is larger than the sum of its proper divisors (128738672).

257477338 is a wasteful number, since it uses less digits than its factorization.

257477338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128738671.

The product of its digits is 987840, while the sum is 46.

The square root of 257477338 is about 16046.1003985392. The cubic root of 257477338 is about 636.1794995239.

The spelling of 257477338 in words is "two hundred fifty-seven million, four hundred seventy-seven thousand, three hundred thirty-eight".