12787986 has 16 divisors (see below), whose sum is σ = 25646400. Its totient is φ = 4250928.

The previous prime is 12787981. The next prime is 12787993. The reversal of 12787986 is 68978721.

It is not an unprimeable number, because it can be changed into a prime (12787981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (1602900).

Almost surely, 2^12787986 is an apocalyptic number.

12787986 is an abundant number, since it is smaller than the sum of its proper divisors (12858414).

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

12787986 is a wasteful number, since it uses less digits than its factorization.

12787986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5873.

The product of its digits is 338688, while the sum is 48.

The square root of 12787986 is about 3576.0293622956. The cubic root of 12787986 is about 233.8482104206.

The spelling of 12787986 in words is "twelve million, seven hundred eighty-seven thousand, nine hundred eighty-six".