13438044740 has 24 divisors (see below), whose sum is σ = 29879888472. Its totient is φ = 5059028480.

The previous prime is 13438044713. The next prime is 13438044773. The reversal of 13438044740 is 4744083431.

It can be written as a sum of positive squares in 4 ways, for example, as 220403716 + 13217641024 = 14846^2 + 114968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13438044694 and 13438044703.

It is an unprimeable number.

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, 19761491 + ... + 19762170.

It is an arithmetic number, because the mean of its divisors is an integer number (1244995353).

Almost surely, 2^13438044740 is an apocalyptic number.

13438044740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13438044740 is an abundant number, since it is smaller than the sum of its proper divisors (16441843732).

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

13438044740 is a wasteful number, since it uses less digits than its factorization.

13438044740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39523687 (or 39523685 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 13438044740 in words is "thirteen billion, four hundred thirty-eight million, forty-four thousand, seven hundred forty".