12707856 has 90 divisors (see below), whose sum is σ = 41393742. Its totient is φ = 3628800.

The previous prime is 12707843. The next prime is 12707899. The reversal of 12707856 is 65870721.

It can be written as a sum of positive squares in only one way, i.e., 8643600 + 4064256 = 2940^2 + 2016^2 .

It is a super-2 number, since 2×12707856² = 322979208233472, which contains 22 as substring.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12707856.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6156 + ... + 7956.

Almost surely, 2^12707856 is an apocalyptic number.

12707856 is a gapful number since it is divisible by the number (16) 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 12707856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20696871).

12707856 is an abundant number, since it is smaller than the sum of its proper divisors (28685886).

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

12707856 is a wasteful number, since it uses less digits than its factorization.

12707856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829 (or 1813 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 12707856 is about 3564.8079892191. The cubic root of 12707856 is about 233.3587527862.

The spelling of 12707856 in words is "twelve million, seven hundred seven thousand, eight hundred fifty-six".