999912012 has 96 divisors (see below), whose sum is σ = 2692435200. Its totient is φ = 285638400.

The previous prime is 999912007. The next prime is 999912071. The reversal of 999912012 is 210219999.

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, 573462 + ... + 575202.

It is an arithmetic number, because the mean of its divisors is an integer number (28046200).

Almost surely, 2^999912012 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 999912012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346217600).

999912012 is an abundant number, since it is smaller than the sum of its proper divisors (1692523188).

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

999912012 is a wasteful number, since it uses less digits than its factorization.

999912012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007 (or 2005 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 999912012 is about 31621.3853586461. The cubic root of 999912012 is about 999.9706698064.

The spelling of 999912012 in words is "nine hundred ninety-nine million, nine hundred twelve thousand, twelve".