12689508 has 24 divisors (see below), whose sum is σ = 31886848. Its totient is φ = 3904416.

The previous prime is 12689507. The next prime is 12689581. The reversal of 12689508 is 80598621.

It is a super-2 number, since 2×12689508² = 322047226564128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12689507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40516 + ... + 40827.

Almost surely, 2^12689508 is an apocalyptic number.

It is an amenable number.

12689508 is an abundant number, since it is smaller than the sum of its proper divisors (19197340).

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

12689508 is a wasteful number, since it uses less digits than its factorization.

12689508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81363 (or 81361 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 12689508 is about 3562.2335689845. The cubic root of 12689508 is about 233.2463884682.

The spelling of 12689508 in words is "twelve million, six hundred eighty-nine thousand, five hundred eight".