999128012 has 12 divisors (see below), whose sum is σ = 1851325560. Its totient is φ = 470177856.

The previous prime is 999128003. The next prime is 999128041. The reversal of 999128012 is 210821999.

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, 7346462 + ... + 7346597.

It is an arithmetic number, because the mean of its divisors is an integer number (154277130).

Almost surely, 2^999128012 is an apocalyptic number.

It is an amenable number.

999128012 is a deficient number, since it is larger than the sum of its proper divisors (852197548).

999128012 is a wasteful number, since it uses less digits than its factorization.

999128012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14693080 (or 14693078 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 999128012 is about 31608.9862539120. The cubic root of 999128012 is about 999.7092528076.

The spelling of 999128012 in words is "nine hundred ninety-nine million, one hundred twenty-eight thousand, twelve".