12690044 has 18 divisors (see below), whose sum is σ = 22501752. Its totient is φ = 6262000.

The previous prime is 12690037. The next prime is 12690049. The reversal of 12690044 is 44009621.

It is a super-2 number, since 2×12690044² = 322074433443872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12689995 and 12690022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40649 + ... + 40959.

Almost surely, 2^12690044 is an apocalyptic number.

It is an amenable number.

12690044 is a deficient number, since it is larger than the sum of its proper divisors (9811708).

12690044 is a wasteful number, since it uses less digits than its factorization.

12690044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 12690044 is about 3562.3088018868. The cubic root of 12690044 is about 233.2496725016.

Adding to 12690044 its reverse (44009621), we get a palindrome (56699665).

The spelling of 12690044 in words is "twelve million, six hundred ninety thousand, forty-four".