13440712 has 8 divisors (see below), whose sum is σ = 25201350. Its totient is φ = 6720352.

The previous prime is 13440709. The next prime is 13440751. The reversal of 13440712 is 21704431.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 1156 = 3666^2 + 34^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840037 + ... + 840052.

Almost surely, 2^13440712 is an apocalyptic number.

It is an amenable number.

13440712 is a deficient number, since it is larger than the sum of its proper divisors (11760638).

13440712 is a wasteful number, since it uses less digits than its factorization.

13440712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680095 (or 1680091 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 13440712 is about 3666.1576616398. The cubic root of 13440712 is about 237.7610765209.

The spelling of 13440712 in words is "thirteen million, four hundred forty thousand, seven hundred twelve".