12986766 has 96 divisors (see below), whose sum is σ = 33546240. Its totient is φ = 3592512.

The previous prime is 12986723. The next prime is 12986783. The reversal of 12986766 is 66768921.

It is a super-2 number, since 2×12986766² = 337312182277512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102195 + ... + 102321.

It is an arithmetic number, because the mean of its divisors is an integer number (349440).

Almost surely, 2^12986766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12986766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16773120).

12986766 is an abundant number, since it is smaller than the sum of its proper divisors (20559474).

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

12986766 is a wasteful number, since it uses less digits than its factorization.

12986766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 187 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 12986766 is about 3603.7155825620. The cubic root of 12986766 is about 235.0536530581.

The spelling of 12986766 in words is "twelve million, nine hundred eighty-six thousand, seven hundred sixty-six".