13843998720 has 144 divisors (see below), whose sum is σ = 47981131380. Its totient is φ = 3691708416.

The previous prime is 13843998713. The next prime is 13843998731. The reversal of 13843998720 is 2789934831.

13843998720 is a `hidden beast` number, since 138 + 439 + 9 + 8 + 72 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11747091456 + 2096907264 = 108384^2 + 45792^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17052 + ... + 167268.

Almost surely, 2^13843998720 is an apocalyptic number.

13843998720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13843998720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23990565690).

13843998720 is an abundant number, since it is smaller than the sum of its proper divisors (34137132660).

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

13843998720 is a wasteful number, since it uses less digits than its factorization.

13843998720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150250 (or 150227 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 13843998720 in words is "thirteen billion, eight hundred forty-three million, nine hundred ninety-eight thousand, seven hundred twenty".