999831140 has 96 divisors (see below), whose sum is σ = 2626041600. Its totient is φ = 310648320.

The previous prime is 999831139. The next prime is 999831163. The reversal of 999831140 is 41138999.

999831140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 999831091 and 999831100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598226 + ... + 599894.

It is an arithmetic number, because the mean of its divisors is an integer number (27354600).

Almost surely, 2^999831140 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 999831140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313020800).

999831140 is an abundant number, since it is smaller than the sum of its proper divisors (1626210460).

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

999831140 is a wasteful number, since it uses less digits than its factorization.

999831140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2083 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 999831140 is about 31620.1065779355. The cubic root of 999831140 is about 999.9437101648.

The spelling of 999831140 in words is "nine hundred ninety-nine million, eight hundred thirty-one thousand, one hundred forty".