13438444 has 12 divisors (see below), whose sum is σ = 23582944. Its totient is φ = 6700464.

The previous prime is 13438441. The next prime is 13438507. The reversal of 13438444 is 44483431.

It is a super-2 number, since 2×13438444² = 361183554282272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13438441) by changing a digit.

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, 3012 + ... + 5995.

Almost surely, 2^13438444 is an apocalyptic number.

It is an amenable number.

13438444 is a deficient number, since it is larger than the sum of its proper divisors (10144500).

13438444 is a wasteful number, since it uses less digits than its factorization.

13438444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384 (or 9382 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 13438444 is about 3665.8483329238. The cubic root of 13438444 is about 237.7477024166.

The spelling of 13438444 in words is "thirteen million, four hundred thirty-eight thousand, four hundred forty-four".