12445890 has 32 divisors (see below), whose sum is σ = 29963520. Its totient is φ = 3308544.

The previous prime is 12445889. The next prime is 12445907. The reversal of 12445890 is 9854421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16951 + ... + 17669.

It is an arithmetic number, because the mean of its divisors is an integer number (936360).

Almost surely, 2^12445890 is an apocalyptic number.

12445890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12445890 is an abundant number, since it is smaller than the sum of its proper divisors (17517630).

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

12445890 is a wasteful number, since it uses less digits than its factorization.

12445890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 12445890 is about 3527.8732970446. The cubic root of 12445890 is about 231.7440821503.

The spelling of 12445890 in words is "twelve million, four hundred forty-five thousand, eight hundred ninety".