999128882 has 8 divisors (see below), whose sum is σ = 1523262252. Its totient is φ = 491374800.

The previous prime is 999128873. The next prime is 999128903. The reversal of 999128882 is 288821999.

It is a Cunningham number, because it is equal to 31609²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 999128881 + 1 = 31609^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4094669 + ... + 4094912.

Almost surely, 2^999128882 is an apocalyptic number.

999128882 is a deficient number, since it is larger than the sum of its proper divisors (524133370).

999128882 is a wasteful number, since it uses less digits than its factorization.

999128882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189644.

The product of its digits is 1492992, while the sum is 56.

The square root of 999128882 is about 31609.0000158183. Note that the first 4 decimals coincide. The cubic root of 999128882 is about 999.7095429762.

The spelling of 999128882 in words is "nine hundred ninety-nine million, one hundred twenty-eight thousand, eight hundred eighty-two".