11644634 has 4 divisors (see below), whose sum is σ = 17466954. Its totient is φ = 5822316.

The previous prime is 11644621. The next prime is 11644637. The reversal of 11644634 is 43644611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43644611 = 1523 ⋅28657.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 442225 = 3347^2 + 665^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11644597 and 11644606.

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, 2911157 + ... + 2911160.

Almost surely, 2^11644634 is an apocalyptic number.

11644634 is a deficient number, since it is larger than the sum of its proper divisors (5822320).

11644634 is an equidigital number, since it uses as much as digits as its factorization.

11644634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822319.

The product of its digits is 6912, while the sum is 29.

The square root of 11644634 is about 3412.4234789955. The cubic root of 11644634 is about 226.6602069478.

The spelling of 11644634 in words is "eleven million, six hundred forty-four thousand, six hundred thirty-four".