12443904 has 108 divisors (see below), whose sum is σ = 39220272. Its totient is φ = 3763200.

The previous prime is 12443903. The next prime is 12443911. The reversal of 12443904 is 40934421.

It is a super-2 number, since 2×12443904² = 309701493522432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12443903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25099 + ... + 25589.

Almost surely, 2^12443904 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 12443904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19610136).

12443904 is an abundant number, since it is smaller than the sum of its proper divisors (26776368).

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

12443904 is a wasteful number, since it uses less digits than its factorization.

12443904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 12443904 is about 3527.5918131212. The cubic root of 12443904 is about 231.7317549689.

The spelling of 12443904 in words is "twelve million, four hundred forty-three thousand, nine hundred four".