12866940 has 36 divisors (see below), whose sum is σ = 39030264. Its totient is φ = 3431136.

The previous prime is 12866939. The next prime is 12866941. The reversal of 12866940 is 4966821.

12866940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12866939) and next prime (12866941).

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 12866895 and 12866904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12866941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35562 + ... + 35921.

It is an arithmetic number, because the mean of its divisors is an integer number (1084174).

Almost surely, 2^12866940 is an apocalyptic number.

12866940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12866940 is an abundant number, since it is smaller than the sum of its proper divisors (26163324).

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

12866940 is a wasteful number, since it uses less digits than its factorization.

12866940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71498 (or 71493 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 12866940 is about 3587.0517141519. The cubic root of 12866940 is about 234.3284889039.

The spelling of 12866940 in words is "twelve million, eight hundred sixty-six thousand, nine hundred forty".