13888963728 has 200 divisors, whose sum is σ = 41637660416. Its totient is φ = 4464979200.

The previous prime is 13888963727. The next prime is 13888963757. The reversal of 13888963728 is 82736988831.

It is not an unprimeable number, because it can be changed into a prime (13888963727) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21011718 + ... + 21012378.

Almost surely, 2^13888963728 is an apocalyptic number.

13888963728 is a gapful number since it is divisible by the number (18) 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 13888963728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20818830208).

13888963728 is an abundant number, since it is smaller than the sum of its proper divisors (27748696688).

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

13888963728 is a wasteful number, since it uses less digits than its factorization.

13888963728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1220 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 13888963728 in words is "thirteen billion, eight hundred eighty-eight million, nine hundred sixty-three thousand, seven hundred twenty-eight".