13403440 has 20 divisors (see below), whose sum is σ = 31163184. Its totient is φ = 5361344.

The previous prime is 13403437. The next prime is 13403447. The reversal of 13403440 is 4430431.

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13403447) 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, 83692 + ... + 83851.

Almost surely, 2^13403440 is an apocalyptic number.

13403440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13403440 is an abundant number, since it is smaller than the sum of its proper divisors (17759744).

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

13403440 is a wasteful number, since it uses less digits than its factorization.

13403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167556 (or 167550 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 13403440 is about 3661.0708815864. The cubic root of 13403440 is about 237.5410972279.

Adding to 13403440 its reverse (4430431), we get a palindrome (17833871).

The spelling of 13403440 in words is "thirteen million, four hundred three thousand, four hundred forty".