999250140 has 144 divisors (see below), whose sum is σ = 3446325792. Its totient is φ = 214953984.

The previous prime is 999250099. The next prime is 999250159. The reversal of 999250140 is 41052999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39984 + ... + 59976.

It is an arithmetic number, because the mean of its divisors is an integer number (23932818).

Almost surely, 2^999250140 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 999250140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723162896).

999250140 is an abundant number, since it is smaller than the sum of its proper divisors (2447075652).

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

999250140 is a wasteful number, since it uses less digits than its factorization.

999250140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20036 (or 20027 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 999250140 is about 31610.9180505723. The cubic root of 999250140 is about 999.7499841640.

The spelling of 999250140 in words is "nine hundred ninety-nine million, two hundred fifty thousand, one hundred forty".