12989636 has 12 divisors (see below), whose sum is σ = 24798480. Its totient is φ = 5904360.

The previous prime is 12989629. The next prime is 12989653. The reversal of 12989636 is 63698921.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 295219 = 12989636 / (1 + 2 + 9 + 8 + 9 + 6 + 3 + 6).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147566 + ... + 147653.

It is an arithmetic number, because the mean of its divisors is an integer number (2066540).

Almost surely, 2^12989636 is an apocalyptic number.

It is an amenable number.

12989636 is a deficient number, since it is larger than the sum of its proper divisors (11808844).

12989636 is a wasteful number, since it uses less digits than its factorization.

12989636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295234 (or 295232 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 12989636 is about 3604.1137606907. The cubic root of 12989636 is about 235.0709669476.

The spelling of 12989636 in words is "twelve million, nine hundred eighty-nine thousand, six hundred thirty-six".