999870016 has 28 divisors (see below), whose sum is σ = 2021560092. Its totient is φ = 490500608.

The previous prime is 999869989. The next prime is 999870017. The reversal of 999870016 is 610078999.

It can be written as a sum of positive squares in 2 ways, for example, as 838681600 + 161188416 = 28960^2 + 12696^2 .

It is not an unprimeable number, because it can be changed into a prime (999870017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143995 + ... + 150778.

Almost surely, 2^999870016 is an apocalyptic number.

It is an amenable number.

999870016 is an abundant number, since it is smaller than the sum of its proper divisors (1021690076).

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

999870016 is a wasteful number, since it uses less digits than its factorization.

999870016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294838 (or 294828 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 999870016 is about 31620.7213073959. The cubic root of 999870016 is about 999.9566701225.

The spelling of 999870016 in words is "nine hundred ninety-nine million, eight hundred seventy thousand, sixteen".