12989436 has 24 divisors (see below), whose sum is σ = 30543744. Its totient is φ = 4296240.

The previous prime is 12989429. The next prime is 12989441. The reversal of 12989436 is 63498921.

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

It is a zygodrome in base 2.

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, 2560 + ... + 5703.

It is an arithmetic number, because the mean of its divisors is an integer number (1272656).

Almost surely, 2^12989436 is an apocalyptic number.

It is an amenable number.

12989436 is an abundant number, since it is smaller than the sum of its proper divisors (17554308).

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

12989436 is a wasteful number, since it uses less digits than its factorization.

12989436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401 (or 8399 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 12989436 is about 3604.0860145119. The cubic root of 12989436 is about 235.0697604875.

The spelling of 12989436 in words is "twelve million, nine hundred eighty-nine thousand, four hundred thirty-six".