12400636 has 12 divisors (see below), whose sum is σ = 21814912. Its totient is φ = 6167808.

The previous prime is 12400627. The next prime is 12400643. The reversal of 12400636 is 63600421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7260 + ... + 8803.

Almost surely, 2^12400636 is an apocalyptic number.

It is an amenable number.

12400636 is a deficient number, since it is larger than the sum of its proper divisors (9414276).

12400636 is a wasteful number, since it uses less digits than its factorization.

12400636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16260 (or 16258 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 12400636 is about 3521.4536771055. The cubic root of 12400636 is about 231.4628625856.

The spelling of 12400636 in words is "twelve million, four hundred thousand, six hundred thirty-six".