12986736 has 40 divisors (see below), whose sum is σ = 38342784. Its totient is φ = 3710400.

The previous prime is 12986723. The next prime is 12986783. The reversal of 12986736 is 63768921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18990 + ... + 19661.

Almost surely, 2^12986736 is an apocalyptic number.

12986736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12986736 is an abundant number, since it is smaller than the sum of its proper divisors (25356048).

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

12986736 is a wasteful number, since it uses less digits than its factorization.

12986736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38669 (or 38663 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 12986736 is about 3603.7114201889. The cubic root of 12986736 is about 235.0534720632.

The spelling of 12986736 in words is "twelve million, nine hundred eighty-six thousand, seven hundred thirty-six".