257285338 has 8 divisors (see below), whose sum is σ = 386010432. Its totient is φ = 128615196.

The previous prime is 257285317. The next prime is 257285339. The reversal of 257285338 is 833582752.

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

It is a junction number, because it is equal to n+sod(n) for n = 257285294 and 257285303.

It is not an unprimeable number, because it can be changed into a prime (257285339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231 + ... + 22717.

It is an arithmetic number, because the mean of its divisors is an integer number (48251304).

Almost surely, 2^257285338 is an apocalyptic number.

257285338 is a deficient number, since it is larger than the sum of its proper divisors (128725094).

257285338 is a wasteful number, since it uses less digits than its factorization.

257285338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27476.

The product of its digits is 403200, while the sum is 43.

The square root of 257285338 is about 16040.1165207738. The cubic root of 257285338 is about 636.0213278846.

The spelling of 257285338 in words is "two hundred fifty-seven million, two hundred eighty-five thousand, three hundred thirty-eight".