13440416 has 24 divisors (see below), whose sum is σ = 28867104. Its totient is φ = 6109120.

The previous prime is 13440409. The next prime is 13440419. The reversal of 13440416 is 61404431.

It is a junction number, because it is equal to n+sod(n) for n = 13440391 and 13440400.

It is not an unprimeable number, because it can be changed into a prime (13440419) 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, 18740 + ... + 19443.

It is an arithmetic number, because the mean of its divisors is an integer number (1202796).

Almost surely, 2^13440416 is an apocalyptic number.

13440416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13440416 is an abundant number, since it is smaller than the sum of its proper divisors (15426688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13440416 is a wasteful number, since it uses less digits than its factorization.

13440416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38204 (or 38196 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 13440416 is about 3666.1172921771. The cubic root of 13440416 is about 237.7593311324.

Adding to 13440416 its reverse (61404431), we get a palindrome (74844847).

The spelling of 13440416 in words is "thirteen million, four hundred forty thousand, four hundred sixteen".