12857232384 has 220 divisors, whose sum is σ = 38589634600. Its totient is φ = 4263985152.

The previous prime is 12857232359. The next prime is 12857232419. The reversal of 12857232384 is 48323275821.

12857232384 is a `hidden beast` number, since 12 + 8 + 572 + 32 + 38 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31435572 + ... + 31435980.

It is an arithmetic number, because the mean of its divisors is an integer number (175407430).

Almost surely, 2^12857232384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12857232384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19294817300).

12857232384 is an abundant number, since it is smaller than the sum of its proper divisors (25732402216).

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

12857232384 is an equidigital number, since it uses as much as digits as its factorization.

12857232384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 793 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The spelling of 12857232384 in words is "twelve billion, eight hundred fifty-seven million, two hundred thirty-two thousand, three hundred eighty-four".