12444890 has 16 divisors (see below), whose sum is σ = 22448232. Its totient is φ = 4967424.

The previous prime is 12444889. The next prime is 12444893. The reversal of 12444890 is 9844421.

It can be written as a sum of positive squares in 4 ways, for example, as 8708401 + 3736489 = 2951^2 + 1933^2 .

It is a super-2 number, since 2×12444890² = 309750574224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12444893) 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, 5162 + ... + 7178.

Almost surely, 2^12444890 is an apocalyptic number.

12444890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12444890 is a deficient number, since it is larger than the sum of its proper divisors (10003342).

12444890 is a wasteful number, since it uses less digits than its factorization.

12444890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 12444890 is about 3527.7315657516. The cubic root of 12444890 is about 231.7378752743.

The spelling of 12444890 in words is "twelve million, four hundred forty-four thousand, eight hundred ninety".