257838938 has 8 divisors (see below), whose sum is σ = 442009632. Its totient is φ = 110502396.

The previous prime is 257838937. The next prime is 257838941. The reversal of 257838938 is 839838752.

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

It is a self number, because there is not a number n which added to its sum of digits gives 257838938.

It is not an unprimeable number, because it can be changed into a prime (257838937) 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, 9208520 + ... + 9208547.

It is an arithmetic number, because the mean of its divisors is an integer number (55251204).

Almost surely, 2^257838938 is an apocalyptic number.

257838938 is a deficient number, since it is larger than the sum of its proper divisors (184170694).

257838938 is a wasteful number, since it uses less digits than its factorization.

257838938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18417076.

The product of its digits is 2903040, while the sum is 53.

The square root of 257838938 is about 16057.3639804297. The cubic root of 257838938 is about 636.4771760788.

The spelling of 257838938 in words is "two hundred fifty-seven million, eight hundred thirty-eight thousand, nine hundred thirty-eight".