999916806 has 32 divisors (see below), whose sum is σ = 2292998400. Its totient is φ = 284756256.

The previous prime is 999916783. The next prime is 999916807. The reversal of 999916806 is 608619999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999916807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25881 + ... + 51668.

It is an arithmetic number, because the mean of its divisors is an integer number (71656200).

Almost surely, 2^999916806 is an apocalyptic number.

999916806 is an abundant number, since it is smaller than the sum of its proper divisors (1293081594).

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

999916806 is a wasteful number, since it uses less digits than its factorization.

999916806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77868.

The product of its (nonzero) digits is 1889568, while the sum is 57.

The square root of 999916806 is about 31621.4611616857. The cubic root of 999916806 is about 999.9722678976.

The spelling of 999916806 in words is "nine hundred ninety-nine million, nine hundred sixteen thousand, eight hundred six".