12977188 has 48 divisors (see below), whose sum is σ = 27820800. Its totient is φ = 5170176.

The previous prime is 12977177. The next prime is 12977191. The reversal of 12977188 is 88177921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 65113 + ... + 65311.

It is an arithmetic number, because the mean of its divisors is an integer number (579600).

Almost surely, 2^12977188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12977188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13910400).

12977188 is an abundant number, since it is smaller than the sum of its proper divisors (14843612).

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

12977188 is a wasteful number, since it uses less digits than its factorization.

12977188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 362 counting only the distinct ones).

The product of its digits is 56448, while the sum is 43.

The square root of 12977188 is about 3602.3864312425. The cubic root of 12977188 is about 234.9958532541.

The spelling of 12977188 in words is "twelve million, nine hundred seventy-seven thousand, one hundred eighty-eight".