999286812 has 18 divisors (see below), whose sum is σ = 2525975088. Its totient is φ = 333095592.

The previous prime is 999286807. The next prime is 999286823. The reversal of 999286812 is 218682999.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13878948 + ... + 13879019.

Almost surely, 2^999286812 is an apocalyptic number.

It is an amenable number.

999286812 is an abundant number, since it is smaller than the sum of its proper divisors (1526688276).

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

999286812 is a wasteful number, since it uses less digits than its factorization.

999286812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27757977 (or 27757972 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 999286812 is about 31611.4980980023. The cubic root of 999286812 is about 999.7622141290.

The spelling of 999286812 in words is "nine hundred ninety-nine million, two hundred eighty-six thousand, eight hundred twelve".