12428889 has 8 divisors (see below), whose sum is σ = 18078432. Its totient is φ = 7532640.

The previous prime is 12428837. The next prime is 12428891. The reversal of 12428889 is 98882421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12428889 - 2¹⁹ = 11904601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12428889.

It is not an unprimeable number, because it can be changed into a prime (12428089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188284 + ... + 188349.

It is an arithmetic number, because the mean of its divisors is an integer number (2259804).

Almost surely, 2^12428889 is an apocalyptic number.

It is an amenable number.

12428889 is a deficient number, since it is larger than the sum of its proper divisors (5649543).

12428889 is a wasteful number, since it uses less digits than its factorization.

12428889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376647.

The product of its digits is 73728, while the sum is 42.

The square root of 12428889 is about 3525.4629483232. The cubic root of 12428889 is about 231.6385137939.

The spelling of 12428889 in words is "twelve million, four hundred twenty-eight thousand, eight hundred eighty-nine".