13968239424 has 168 divisors, whose sum is σ = 39316566528. Its totient is φ = 4375848960.

The previous prime is 13968239423. The next prime is 13968239521. The reversal of 13968239424 is 42493286931.

It is a super-2 number, since 2×13968239424² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13968239423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9495009 + ... + 9496479.

Almost surely, 2^13968239424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13968239424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19658283264).

13968239424 is an abundant number, since it is smaller than the sum of its proper divisors (25348327104).

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

13968239424 is a wasteful number, since it uses less digits than its factorization.

13968239424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1632 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 51.

The spelling of 13968239424 in words is "thirteen billion, nine hundred sixty-eight million, two hundred thirty-nine thousand, four hundred twenty-four".