257838382 has 4 divisors (see below), whose sum is σ = 386757576. Its totient is φ = 128919190.

The previous prime is 257838359. The next prime is 257838401. The reversal of 257838382 is 283838752.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64459594 + ... + 64459597.

It is an arithmetic number, because the mean of its divisors is an integer number (96689394).

Almost surely, 2^257838382 is an apocalyptic number.

257838382 is a deficient number, since it is larger than the sum of its proper divisors (128919194).

257838382 is a wasteful number, since it uses less digits than its factorization.

257838382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128919193.

The product of its digits is 645120, while the sum is 46.

The square root of 257838382 is about 16057.3466674915. The cubic root of 257838382 is about 636.4767185818.

The spelling of 257838382 in words is "two hundred fifty-seven million, eight hundred thirty-eight thousand, three hundred eighty-two".