12023644 has 6 divisors (see below), whose sum is σ = 21041384. Its totient is φ = 6011820.

The previous prime is 12023623. The next prime is 12023651. The reversal of 12023644 is 44632021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1502952 + ... + 1502959.

Almost surely, 2^12023644 is an apocalyptic number.

It is an amenable number.

12023644 is a deficient number, since it is larger than the sum of its proper divisors (9017740).

12023644 is a wasteful number, since it uses less digits than its factorization.

12023644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005915 (or 3005913 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 12023644 is about 3467.5126531853. The cubic root of 12023644 is about 229.0931144378.

Adding to 12023644 its reverse (44632021), we get a palindrome (56655665).

The spelling of 12023644 in words is "twelve million, twenty-three thousand, six hundred forty-four".