39989638000 has 160 divisors (see below), whose sum is σ = 104362195392. Its totient is φ = 14732928000.

The previous prime is 39989637997. The next prime is 39989638009. The reversal of 39989638000 is 83698993.

39989638000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×39989638000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39989638009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14064579 + ... + 14067421.

Almost surely, 2^39989638000 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 39989638000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52181097696).

39989638000 is an abundant number, since it is smaller than the sum of its proper divisors (64372557392).

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

39989638000 is a wasteful number, since it uses less digits than its factorization.

39989638000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420 (or 3404 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 39989638000 in words is "thirty-nine billion, nine hundred eighty-nine million, six hundred thirty-eight thousand".