11998636 has 12 divisors (see below), whose sum is σ = 22612912. Its totient is φ = 5537808.

The previous prime is 11998621. The next prime is 11998661. The reversal of 11998636 is 63689911.

It is a junction number, because it is equal to n+sod(n) for n = 11998592 and 11998601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115320 + ... + 115423.

Almost surely, 2^11998636 is an apocalyptic number.

It is an amenable number.

11998636 is a deficient number, since it is larger than the sum of its proper divisors (10614276).

11998636 is a wasteful number, since it uses less digits than its factorization.

11998636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230760 (or 230758 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 11998636 is about 3463.9047331011. The cubic root of 11998636 is about 228.9341737918.

The spelling of 11998636 in words is "eleven million, nine hundred ninety-eight thousand, six hundred thirty-six".