12689320 has 32 divisors (see below), whose sum is σ = 32630400. Its totient is φ = 4350528.

The previous prime is 12689317. The next prime is 12689357. The reversal of 12689320 is 2398621.

12689320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12689320² = 322037684124800, which contains 22 as substring.

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, 22380 + ... + 22939.

It is an arithmetic number, because the mean of its divisors is an integer number (1019700).

Almost surely, 2^12689320 is an apocalyptic number.

12689320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12689320 is an abundant number, since it is smaller than the sum of its proper divisors (19941080).

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

12689320 is a wasteful number, since it uses less digits than its factorization.

12689320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45337 (or 45333 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 12689320 is about 3562.2071809484. The cubic root of 12689320 is about 233.2452365839.

The spelling of 12689320 in words is "twelve million, six hundred eighty-nine thousand, three hundred twenty".