12839428 has 24 divisors (see below), whose sum is σ = 26796672. Its totient is φ = 5263104.

The previous prime is 12839419. The next prime is 12839429. The reversal of 12839428 is 82493821.

It is a super-2 number, since 2×12839428² = 329701822734368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12839429) 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, 9325 + ... + 10612.

It is an arithmetic number, because the mean of its divisors is an integer number (1116528).

Almost surely, 2^12839428 is an apocalyptic number.

It is an amenable number.

12839428 is an abundant number, since it is smaller than the sum of its proper divisors (13957244).

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

12839428 is a wasteful number, since it uses less digits than its factorization.

12839428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19971 (or 19969 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 12839428 is about 3583.2147577280. The cubic root of 12839428 is about 234.1613565550.

The spelling of 12839428 in words is "twelve million, eight hundred thirty-nine thousand, four hundred twenty-eight".