12389806 has 16 divisors (see below), whose sum is σ = 21834288. Its totient is φ = 5198400.

The previous prime is 12389803. The next prime is 12389833. The reversal of 12389806 is 60898321.

12389806 = T₃₁₈ + T₃₁₉ + ... + T₄₇₃.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12389803) 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, 21375 + ... + 21946.

It is an arithmetic number, because the mean of its divisors is an integer number (1364643).

Almost surely, 2^12389806 is an apocalyptic number.

12389806 is a deficient number, since it is larger than the sum of its proper divisors (9444482).

12389806 is a wasteful number, since it uses less digits than its factorization.

12389806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43347.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 12389806 is about 3519.9156239887. The cubic root of 12389806 is about 231.3954608570.

The spelling of 12389806 in words is "twelve million, three hundred eighty-nine thousand, eight hundred six".