12797820 has 108 divisors (see below), whose sum is σ = 45189144. Its totient is φ = 2923200.

The previous prime is 12797809. The next prime is 12797833. The reversal of 12797820 is 2879721.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8095 + ... + 9545.

It is an arithmetic number, because the mean of its divisors is an integer number (418418).

Almost surely, 2^12797820 is an apocalyptic number.

12797820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12797820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22594572).

12797820 is an abundant number, since it is smaller than the sum of its proper divisors (32391324).

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

12797820 is a wasteful number, since it uses less digits than its factorization.

12797820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 12797820 is about 3577.4040867646. The cubic root of 12797820 is about 233.9081383892.

The spelling of 12797820 in words is "twelve million, seven hundred ninety-seven thousand, eight hundred twenty".