999210852 has 18 divisors (see below), whose sum is σ = 2525783078. Its totient is φ = 333070272.

The previous prime is 999210841. The next prime is 999210857. The reversal of 999210852 is 258012999.

It can be written as a sum of positive squares in only one way, i.e., 994519296 + 4691556 = 31536^2 + 2166^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 999210798 and 999210807.

It is not an unprimeable number, because it can be changed into a prime (999210857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13877893 + ... + 13877964.

Almost surely, 2^999210852 is an apocalyptic number.

It is an amenable number.

999210852 is an abundant number, since it is smaller than the sum of its proper divisors (1526572226).

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

999210852 is a wasteful number, since it uses less digits than its factorization.

999210852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27755867 (or 27755862 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 999210852 is about 31610.2966136036. The cubic root of 999210852 is about 999.7368814414.

The spelling of 999210852 in words is "nine hundred ninety-nine million, two hundred ten thousand, eight hundred fifty-two".