12290644 has 24 divisors (see below), whose sum is σ = 23032800. Its totient is φ = 5721120.

The previous prime is 12290639. The next prime is 12290651. The reversal of 12290644 is 44609221.

12290644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3114 + ... + 5854.

It is an arithmetic number, because the mean of its divisors is an integer number (959700).

Almost surely, 2^12290644 is an apocalyptic number.

It is an amenable number.

12290644 is a deficient number, since it is larger than the sum of its proper divisors (10742156).

12290644 is a wasteful number, since it uses less digits than its factorization.

12290644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 12290644 is about 3505.8014775512. The cubic root of 12290644 is about 230.7764808776.

Adding to 12290644 its reverse (44609221), we get a palindrome (56899865).

The spelling of 12290644 in words is "twelve million, two hundred ninety thousand, six hundred forty-four".