12689430 has 32 divisors (see below), whose sum is σ = 32798304. Its totient is φ = 3123456.

The previous prime is 12689423. The next prime is 12689477. The reversal of 12689430 is 3498621.

It is a super-2 number, since 2×12689430² = 322043267449800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12689391 and 12689400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15879 + ... + 16658.

It is an arithmetic number, because the mean of its divisors is an integer number (1024947).

Almost surely, 2^12689430 is an apocalyptic number.

12689430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12689430 is an abundant number, since it is smaller than the sum of its proper divisors (20108874).

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

12689430 is a wasteful number, since it uses less digits than its factorization.

12689430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32560.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 12689430 is about 3562.2226207805. Note that the first 3 decimals coincide. The cubic root of 12689430 is about 233.2459105601.

The spelling of 12689430 in words is "twelve million, six hundred eighty-nine thousand, four hundred thirty".