12857730 has 32 divisors (see below), whose sum is σ = 31924800. Its totient is φ = 3310272.

The previous prime is 12857711. The next prime is 12857771. The reversal of 12857730 is 3775821.

It is a junction number, because it is equal to n+sod(n) for n = 12857691 and 12857700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6520 + ... + 8259.

It is an arithmetic number, because the mean of its divisors is an integer number (997650).

Almost surely, 2^12857730 is an apocalyptic number.

12857730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12857730 is an abundant number, since it is smaller than the sum of its proper divisors (19067070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12857730 is a wasteful number, since it uses less digits than its factorization.

12857730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14818.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 12857730 is about 3585.7677002282. The cubic root of 12857730 is about 234.2725657262.

The spelling of 12857730 in words is "twelve million, eight hundred fifty-seven thousand, seven hundred thirty".