12858432 has 56 divisors (see below), whose sum is σ = 34296096. Its totient is φ = 4251648.

The previous prime is 12858431. The next prime is 12858437. The reversal of 12858432 is 23485821.

It is a junction number, because it is equal to n+sod(n) for n = 12858393 and 12858402.

It is not an unprimeable number, because it can be changed into a prime (12858431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36883 + ... + 37229.

Almost surely, 2^12858432 is an apocalyptic number.

12858432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12858432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17148048).

12858432 is an abundant number, since it is smaller than the sum of its proper divisors (21437664).

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

12858432 is a wasteful number, since it uses less digits than its factorization.

12858432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 545 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 12858432 is about 3585.8655858802. The cubic root of 12858432 is about 234.2768292146.

The spelling of 12858432 in words is "twelve million, eight hundred fifty-eight thousand, four hundred thirty-two".