12977920 has 36 divisors (see below), whose sum is σ = 31089240. Its totient is φ = 5190656.

The previous prime is 12977879. The next prime is 12977927. The reversal of 12977920 is 2977921.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 12977920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12977927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3790 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (863590).

Almost surely, 2^12977920 is an apocalyptic number.

12977920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12977920 is an abundant number, since it is smaller than the sum of its proper divisors (18111320).

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

12977920 is an equidigital number, since it uses as much as digits as its factorization.

12977920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160 (or 10146 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 12977920 is about 3602.4880291265. The cubic root of 12977920 is about 235.0002716158. Note that the first 3 decimals are identical.

Subtracting from 12977920 its reverse (2977921), we obtain a palindrome (9999999).

The spelling of 12977920 in words is "twelve million, nine hundred seventy-seven thousand, nine hundred twenty".