999810012 has 24 divisors (see below), whose sum is σ = 2334189312. Its totient is φ = 333084400.

The previous prime is 999810011. The next prime is 999810067. The reversal of 999810012 is 210018999.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999810011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187 + ... + 44717.

It is an arithmetic number, because the mean of its divisors is an integer number (97257888).

Almost surely, 2^999810012 is an apocalyptic number.

It is an amenable number.

999810012 is an abundant number, since it is smaller than the sum of its proper divisors (1334379300).

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

999810012 is a wasteful number, since it uses less digits than its factorization.

999810012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46409 (or 46407 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 999810012 is about 31619.7724849500. The cubic root of 999810012 is about 999.9366666556.

The spelling of 999810012 in words is "nine hundred ninety-nine million, eight hundred ten thousand, twelve".