12802820 has 24 divisors (see below), whose sum is σ = 27513024. Its totient is φ = 5001696.

The previous prime is 12802817. The next prime is 12802831. The reversal of 12802820 is 2820821.

12802820 = 129² + 130² + ... + 343².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6584 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (1146376).

Almost surely, 2^12802820 is an apocalyptic number.

12802820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12802820 is an abundant number, since it is smaller than the sum of its proper divisors (14710204).

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

12802820 is a wasteful number, since it uses less digits than its factorization.

12802820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14939 (or 14937 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 12802820 is about 3578.1028492764. The cubic root of 12802820 is about 233.9385963998.

The spelling of 12802820 in words is "twelve million, eight hundred two thousand, eight hundred twenty".