12689730 has 64 divisors (see below), whose sum is σ = 34657920. Its totient is φ = 3302208.

The previous prime is 12689711. The next prime is 12689731. The reversal of 12689730 is 3798621.

It is a super-2 number, since 2×12689730² = 322058494945800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11064 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (541530).

Almost surely, 2^12689730 is an apocalyptic number.

12689730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12689730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17328960).

12689730 is an abundant number, since it is smaller than the sum of its proper divisors (21968190).

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

12689730 is a wasteful number, since it uses less digits than its factorization.

12689730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 12689730 is about 3562.2647290733. The cubic root of 12689730 is about 233.2477486575.

The spelling of 12689730 in words is "twelve million, six hundred eighty-nine thousand, seven hundred thirty".