12788920 has 32 divisors (see below), whose sum is σ = 30028320. Its totient is φ = 4892800.

The previous prime is 12788891. The next prime is 12788933. The reversal of 12788920 is 2988721.

It is a self number, because there is not a number n which added to its sum of digits gives 12788920.

It is a congruent number.

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, 6031 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (938385).

Almost surely, 2^12788920 is an apocalyptic number.

12788920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12788920 is an abundant number, since it is smaller than the sum of its proper divisors (17239400).

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

12788920 is a wasteful number, since it uses less digits than its factorization.

12788920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935 (or 13931 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 12788920 is about 3576.1599516800. The cubic root of 12788920 is about 233.8539034961.

The spelling of 12788920 in words is "twelve million, seven hundred eighty-eight thousand, nine hundred twenty".