13444385 has 4 divisors (see below), whose sum is σ = 16133268. Its totient is φ = 10755504.

The previous prime is 13444373. The next prime is 13444469. The reversal of 13444385 is 58344431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58344431 = 1303 ⋅44777.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 7134241 = 2512^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 13444385 - 2⁴ = 13444369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344434 + ... + 1344443.

It is an arithmetic number, because the mean of its divisors is an integer number (4033317).

Almost surely, 2^13444385 is an apocalyptic number.

It is an amenable number.

13444385 is a deficient number, since it is larger than the sum of its proper divisors (2688883).

13444385 is an equidigital number, since it uses as much as digits as its factorization.

13444385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688882.

The product of its digits is 23040, while the sum is 32.

The square root of 13444385 is about 3666.6585605971. The cubic root of 13444385 is about 237.7827325388.

The spelling of 13444385 in words is "thirteen million, four hundred forty-four thousand, three hundred eighty-five".