12819220 has 24 divisors (see below), whose sum is σ = 27028008. Its totient is φ = 5107200.

The previous prime is 12819197. The next prime is 12819329. The reversal of 12819220 is 2291821.

It can be written as a sum of positive squares in 4 ways, for example, as 2553604 + 10265616 = 1598^2 + 3204^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4480 + ... + 6760.

It is an arithmetic number, because the mean of its divisors is an integer number (1126167).

Almost surely, 2^12819220 is an apocalyptic number.

12819220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12819220 is an abundant number, since it is smaller than the sum of its proper divisors (14208788).

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

12819220 is a wasteful number, since it uses less digits than its factorization.

12819220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571 (or 2569 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12819220 is about 3580.3938330860. The cubic root of 12819220 is about 234.0384430472.

It can be divided in two parts, 1281 and 9220, that added together give a palindrome (10501).

The spelling of 12819220 in words is "twelve million, eight hundred nineteen thousand, two hundred twenty".