13408431 has 8 divisors (see below), whose sum is σ = 17902080. Its totient is φ = 8926872.

The previous prime is 13408397. The next prime is 13408463. The reversal of 13408431 is 13480431.

13408431 is a nontrivial binomial coefficient, being equal to C(5179, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13408431 - 2¹³ = 13400239 is a prime.

It is a super-2 number, since 2×13408431² = 359572043763522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13408481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 5178.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^13408431 is an apocalyptic number.

13408431 is the 5178-th triangular number.

13408431 is a deficient number, since it is larger than the sum of its proper divisors (4493649).

13408431 is an equidigital number, since it uses as much as digits as its factorization.

13408431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6045.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 13408431 is about 3661.7524493062. The cubic root of 13408431 is about 237.5705777317.

Adding to 13408431 its reverse (13480431), we get a palindrome (26888862).

The spelling of 13408431 in words is "thirteen million, four hundred eight thousand, four hundred thirty-one".