12889443 has 16 divisors (see below), whose sum is σ = 19699200. Its totient is φ = 7343616.

The previous prime is 12889433. The next prime is 12889447. The reversal of 12889443 is 34498821.

12889443 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12889443 - 2⁸ = 12889187 is a prime.

It is a super-2 number, since 2×12889443² = 332275481700498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12889447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8746 + ... + 10112.

It is an arithmetic number, because the mean of its divisors is an integer number (1231200).

Almost surely, 2^12889443 is an apocalyptic number.

12889443 is a deficient number, since it is larger than the sum of its proper divisors (6809757).

12889443 is a wasteful number, since it uses less digits than its factorization.

12889443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826.

The product of its digits is 55296, while the sum is 39.

The square root of 12889443 is about 3590.1870424812. The cubic root of 12889443 is about 234.4650150951.

It can be divided in two parts, 1288 and 9443, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 12889443 in words is "twelve million, eight hundred eighty-nine thousand, four hundred forty-three".