13440346 has 4 divisors (see below), whose sum is σ = 20160522. Its totient is φ = 6720172.

The previous prime is 13440341. The next prime is 13440379. The reversal of 13440346 is 64304431.

It is a happy number.

13440346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64304431 = 61 ⋅1054171.

It can be written as a sum of positive squares in only one way, i.e., 13242321 + 198025 = 3639^2 + 445^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13440346.

It is not an unprimeable number, because it can be changed into a prime (13440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360085 + ... + 3360088.

Almost surely, 2^13440346 is an apocalyptic number.

13440346 is a deficient number, since it is larger than the sum of its proper divisors (6720176).

13440346 is an equidigital number, since it uses as much as digits as its factorization.

13440346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720175.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 13440346 is about 3666.1077452797. The cubic root of 13440346 is about 237.7589183678.

Adding to 13440346 its reverse (64304431), we get a palindrome (77744777).

The spelling of 13440346 in words is "thirteen million, four hundred forty thousand, three hundred forty-six".