11644636 has 6 divisors (see below), whose sum is σ = 20378120. Its totient is φ = 5822316.

The previous prime is 11644621. The next prime is 11644637. The reversal of 11644636 is 63644611.

It is a junction number, because it is equal to n+sod(n) for n = 11644598 and 11644607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1455576 + ... + 1455583.

Almost surely, 2^11644636 is an apocalyptic number.

It is an amenable number.

11644636 is a deficient number, since it is larger than the sum of its proper divisors (8733484).

11644636 is a wasteful number, since it uses less digits than its factorization.

11644636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911163 (or 2911161 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 11644636 is about 3412.4237720424. The cubic root of 11644636 is about 226.6602199243.

The spelling of 11644636 in words is "eleven million, six hundred forty-four thousand, six hundred thirty-six".