999938005900 has 216 divisors, whose sum is σ = 2438788352000. Its totient is φ = 354803328000.

The previous prime is 999938005889. The next prime is 999938005901. The reversal of 999938005900 is 9500839999.

999938005900 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-3 number, since 3×999938005900³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (999938005901) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 109266325 + ... + 109275475.

Almost surely, 2^999938005900 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 999938005900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1219394176000).

999938005900 is an abundant number, since it is smaller than the sum of its proper divisors (1438850346100).

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

999938005900 is a wasteful number, since it uses less digits than its factorization.

999938005900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417 (or 9393 counting only the distinct ones).

The product of its (nonzero) digits is 7085880, while the sum is 61.

The spelling of 999938005900 in words is "nine hundred ninety-nine billion, nine hundred thirty-eight million, five thousand, nine hundred".