12839220 has 36 divisors (see below), whose sum is σ = 38946180. Its totient is φ = 3423744.

The previous prime is 12839213. The next prime is 12839243. The reversal of 12839220 is 2293821.

It is a happy number.

12839220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1790244 + 11048976 = 1338^2 + 3324^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35485 + ... + 35844.

Almost surely, 2^12839220 is an apocalyptic number.

12839220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12839220 is an abundant number, since it is smaller than the sum of its proper divisors (26106960).

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

12839220 is a wasteful number, since it uses less digits than its factorization.

12839220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71344 (or 71339 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12839220 is about 3583.1857333942. The cubic root of 12839220 is about 234.1600920691.

The spelling of 12839220 in words is "twelve million, eight hundred thirty-nine thousand, two hundred twenty".