257848438 has 8 divisors (see below), whose sum is σ = 390321360. Its totient is φ = 127741320.

The previous prime is 257848427. The next prime is 257848441. The reversal of 257848438 is 834848752.

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 = 257848391 and 257848400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591178 + ... + 591613.

It is an arithmetic number, because the mean of its divisors is an integer number (48790170).

Almost surely, 2^257848438 is an apocalyptic number.

257848438 is a deficient number, since it is larger than the sum of its proper divisors (132472922).

257848438 is a wasteful number, since it uses less digits than its factorization.

257848438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182902.

The product of its digits is 1720320, while the sum is 49.

The square root of 257848438 is about 16057.6597921366. The cubic root of 257848438 is about 636.4849929210.

The spelling of 257848438 in words is "two hundred fifty-seven million, eight hundred forty-eight thousand, four hundred thirty-eight".