13440436 has 12 divisors (see below), whose sum is σ = 23919840. Its totient is φ = 6606200.

The previous prime is 13440431. The next prime is 13440437. The reversal of 13440436 is 63404431.

It is a happy number.

13440436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13440436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440431) 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, 28240 + ... + 28711.

It is an arithmetic number, because the mean of its divisors is an integer number (1993320).

Almost surely, 2^13440436 is an apocalyptic number.

It is an amenable number.

13440436 is a deficient number, since it is larger than the sum of its proper divisors (10479404).

13440436 is a wasteful number, since it uses less digits than its factorization.

13440436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57014 (or 57012 counting only the distinct ones).

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

The square root of 13440436 is about 3666.1200198575. The cubic root of 13440436 is about 237.7594490648.

Adding to 13440436 its reverse (63404431), we get a palindrome (76844867).

The spelling of 13440436 in words is "thirteen million, four hundred forty thousand, four hundred thirty-six".