13440404434 has 8 divisors (see below), whose sum is σ = 20163205260. Its totient is φ = 6719336016.

The previous prime is 13440404377. The next prime is 13440404437. The reversal of 13440404434 is 43440404431.

It can be written as a sum of positive squares in 2 ways, for example, as 11203587409 + 2236817025 = 105847^2 + 47295^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 13440404396 and 13440404405.

It is not an unprimeable number, because it can be changed into a prime (13440404437) 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, 413529 + ... + 444844.

Almost surely, 2^13440404434 is an apocalyptic number.

13440404434 is a deficient number, since it is larger than the sum of its proper divisors (6722800826).

13440404434 is an equidigital number, since it uses as much as digits as its factorization.

13440404434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866204.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 13440404434 its reverse (43440404431), we get a palindrome (56880808865).

The spelling of 13440404434 in words is "thirteen billion, four hundred forty million, four hundred four thousand, four hundred thirty-four".