12689404 has 48 divisors (see below), whose sum is σ = 27772416. Its totient is φ = 4939200.

The previous prime is 12689401. The next prime is 12689423. The reversal of 12689404 is 40498621.

It is a super-2 number, since 2×12689404² = 322041947750432, which contains 22 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 12689404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25599 + ... + 26089.

It is an arithmetic number, because the mean of its divisors is an integer number (578592).

Almost surely, 2^12689404 is an apocalyptic number.

12689404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12689404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13886208).

12689404 is an abundant number, since it is smaller than the sum of its proper divisors (15083012).

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

12689404 is a wasteful number, since it uses less digits than its factorization.

12689404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 12689404 is about 3562.2189713716. The cubic root of 12689404 is about 233.2457512570.

The spelling of 12689404 in words is "twelve million, six hundred eighty-nine thousand, four hundred four".