999948288 has 72 divisors (see below), whose sum is σ = 2667567168. Its totient is φ = 333185024.

The previous prime is 999948269. The next prime is 999948289. The reversal of 999948288 is 882849999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999948289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391945 + ... + 394487.

It is an arithmetic number, because the mean of its divisors is an integer number (37049544).

Almost surely, 2^999948288 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 999948288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1333783584).

999948288 is an abundant number, since it is smaller than the sum of its proper divisors (1667618880).

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

999948288 is an frugal number, since it uses more digits than its factorization.

999948288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580 (or 2548 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 66.

The square root of 999948288 is about 31621.9589526013. The cubic root of 999948288 is about 999.9827623695.

The spelling of 999948288 in words is "nine hundred ninety-nine million, nine hundred forty-eight thousand, two hundred eighty-eight".