12857438 has 8 divisors (see below), whose sum is σ = 21039480. Its totient is φ = 5844280.

The previous prime is 12857431. The next prime is 12857443. The reversal of 12857438 is 83475821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857431) 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, 292193 + ... + 292236.

It is an arithmetic number, because the mean of its divisors is an integer number (2629935).

Almost surely, 2^12857438 is an apocalyptic number.

12857438 is a deficient number, since it is larger than the sum of its proper divisors (8182042).

12857438 is a wasteful number, since it uses less digits than its factorization.

12857438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584442.

The product of its digits is 53760, while the sum is 38.

The square root of 12857438 is about 3585.7269834721. The cubic root of 12857438 is about 234.2707922637.

The spelling of 12857438 in words is "twelve million, eight hundred fifty-seven thousand, four hundred thirty-eight".