13440044 has 6 divisors (see below), whose sum is σ = 23520084. Its totient is φ = 6720020.

The previous prime is 13440043. The next prime is 13440059. The reversal of 13440044 is 44004431.

It is a junction number, because it is equal to n+sod(n) for n = 13439998 and 13440025.

It is not an unprimeable number, because it can be changed into a prime (13440041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680002 + ... + 1680009.

It is an arithmetic number, because the mean of its divisors is an integer number (3920014).

Almost surely, 2^13440044 is an apocalyptic number.

It is an amenable number.

13440044 is a deficient number, since it is larger than the sum of its proper divisors (10080040).

13440044 is a wasteful number, since it uses less digits than its factorization.

13440044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360015 (or 3360013 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 13440044 is about 3666.0665569517. The cubic root of 13440044 is about 237.7571375672.

Adding to 13440044 its reverse (44004431), we get a palindrome (57444475).

The spelling of 13440044 in words is "thirteen million, four hundred forty thousand, forty-four".