13440386 has 8 divisors (see below), whose sum is σ = 20188560. Its totient is φ = 6710868.

The previous prime is 13440379. The next prime is 13440389. The reversal of 13440386 is 68304431.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13440389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696 + ... + 5843.

It is an arithmetic number, because the mean of its divisors is an integer number (2523570).

Almost surely, 2^13440386 is an apocalyptic number.

13440386 is a deficient number, since it is larger than the sum of its proper divisors (6748174).

13440386 is an equidigital number, since it uses as much as digits as its factorization.

13440386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9328.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 13440386 is about 3666.1132006527. The cubic root of 13440386 is about 237.7591542335.

The spelling of 13440386 in words is "thirteen million, four hundred forty thousand, three hundred eighty-six".