12689922 has 48 divisors (see below), whose sum is σ = 31272480. Its totient is φ = 3411072.

The previous prime is 12689893. The next prime is 12689923. The reversal of 12689922 is 22998621.

It is a super-2 number, since 2×12689922² = 322068240732168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12689923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3729 + ... + 6267.

It is an arithmetic number, because the mean of its divisors is an integer number (651510).

Almost surely, 2^12689922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12689922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15636240).

12689922 is an abundant number, since it is smaller than the sum of its proper divisors (18582558).

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

12689922 is a wasteful number, since it uses less digits than its factorization.

12689922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575 (or 2568 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 12689922 is about 3562.2916781196. The cubic root of 12689922 is about 233.2489250245.

The spelling of 12689922 in words is "twelve million, six hundred eighty-nine thousand, nine hundred twenty-two".