12689806 has 16 divisors (see below), whose sum is σ = 19375200. Its totient is φ = 6232608.

The previous prime is 12689797. The next prime is 12689821. The reversal of 12689806 is 60898621.

12689806 = T₄₄₄ + T₄₄₅ + ... + T₅₄₆.

It is a super-2 number, since 2×12689806² = 322062352635272, which contains 22 as substring.

It is a congruent number.

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, 47040 + ... + 47308.

It is an arithmetic number, because the mean of its divisors is an integer number (1210950).

Almost surely, 2^12689806 is an apocalyptic number.

12689806 is a deficient number, since it is larger than the sum of its proper divisors (6685394).

12689806 is a wasteful number, since it uses less digits than its factorization.

12689806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 12689806 is about 3562.2753964285. The cubic root of 12689806 is about 233.2482143042.

The spelling of 12689806 in words is "twelve million, six hundred eighty-nine thousand, eight hundred six".