12866720 has 96 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 4781056.

The previous prime is 12866719. The next prime is 12866741. The reversal of 12866720 is 2766821.

12866720 = T₄₆₉ + T₄₇₀ + ... + T₅₆₄.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218051 + ... + 218109.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^12866720 is an apocalyptic number.

12866720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12866720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16329600).

12866720 is an abundant number, since it is smaller than the sum of its proper divisors (19792480).

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

12866720 is a wasteful number, since it uses less digits than its factorization.

12866720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 12866720 is about 3587.0210481680. The cubic root of 12866720 is about 234.3271533737.

The spelling of 12866720 in words is "twelve million, eight hundred sixty-six thousand, seven hundred twenty".