13644434 has 4 divisors (see below), whose sum is σ = 20466654. Its totient is φ = 6822216.

The previous prime is 13644427. The next prime is 13644439. The reversal of 13644434 is 43444631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43444631 = 23 ⋅1888897.

It can be written as a sum of positive squares in only one way, i.e., 8791225 + 4853209 = 2965^2 + 2203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13644397 and 13644406.

It is not an unprimeable number, because it can be changed into a prime (13644439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3411107 + ... + 3411110.

Almost surely, 2^13644434 is an apocalyptic number.

13644434 is a deficient number, since it is larger than the sum of its proper divisors (6822220).

13644434 is an equidigital number, since it uses as much as digits as its factorization.

13644434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822219.

The product of its digits is 13824, while the sum is 29.

The square root of 13644434 is about 3693.8373001528. The cubic root of 13644434 is about 238.9563128075.

The spelling of 13644434 in words is "thirteen million, six hundred forty-four thousand, four hundred thirty-four".