13440369 has 8 divisors (see below), whose sum is σ = 18538560. Its totient is φ = 8651216.

The previous prime is 13440341. The next prime is 13440379. The reversal of 13440369 is 96304431.

13440369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13440369 - 2⁷ = 13440241 is a prime.

It is a super-2 number, since 2×13440369² = 361287037712322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13440379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77157 + ... + 77330.

It is an arithmetic number, because the mean of its divisors is an integer number (2317320).

Almost surely, 2^13440369 is an apocalyptic number.

It is an amenable number.

13440369 is a deficient number, since it is larger than the sum of its proper divisors (5098191).

13440369 is a wasteful number, since it uses less digits than its factorization.

13440369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154519.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 13440369 is about 3666.1108821202. The cubic root of 13440369 is about 237.7590539906.

The spelling of 13440369 in words is "thirteen million, four hundred forty thousand, three hundred sixty-nine".