13444434140 has 12 divisors (see below), whose sum is σ = 28233311736. Its totient is φ = 5377773648.

The previous prime is 13444434131. The next prime is 13444434151. The reversal of 13444434140 is 4143444431.

It is a junction number, because it is equal to n+sod(n) for n = 13444434097 and 13444434106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336110834 + ... + 336110873.

It is an arithmetic number, because the mean of its divisors is an integer number (2352775978).

Almost surely, 2^13444434140 is an apocalyptic number.

13444434140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13444434140 is an abundant number, since it is smaller than the sum of its proper divisors (14788877596).

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

13444434140 is a wasteful number, since it uses less digits than its factorization.

13444434140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672221716 (or 672221714 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 13444434140 its reverse (4143444431), we get a palindrome (17587878571).

The spelling of 13444434140 in words is "thirteen billion, four hundred forty-four million, four hundred thirty-four thousand, one hundred forty".