12780868 has 6 divisors (see below), whose sum is σ = 22366526. Its totient is φ = 6390432.

The previous prime is 12780827. The next prime is 12780869. The reversal of 12780868 is 86808721.

It can be written as a sum of positive squares in only one way, i.e., 12446784 + 334084 = 3528^2 + 578^2 .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 12780868.

It is not an unprimeable number, because it can be changed into a prime (12780869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597605 + ... + 1597612.

Almost surely, 2^12780868 is an apocalyptic number.

It is an amenable number.

12780868 is a deficient number, since it is larger than the sum of its proper divisors (9585658).

12780868 is a wasteful number, since it uses less digits than its factorization.

12780868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195221 (or 3195219 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 12780868 is about 3575.0339858524. The cubic root of 12780868 is about 233.8048144682.

The spelling of 12780868 in words is "twelve million, seven hundred eighty thousand, eight hundred sixty-eight".