990170000 has 50 divisors (see below), whose sum is σ = 2397324798. Its totient is φ = 396064000.

The previous prime is 990169993. The next prime is 990170023. The reversal of 990170000 is 71099.

It can be written as a sum of positive squares in 5 ways, for example, as 755590144 + 234579856 = 27488^2 + 15316^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39509 + ... + 59508.

Almost surely, 2^990170000 is an apocalyptic number.

It is an amenable number.

990170000 is an abundant number, since it is smaller than the sum of its proper divisors (1407154798).

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

990170000 is an equidigital number, since it uses as much as digits as its factorization.

990170000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99045 (or 99024 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 990170000 is about 31466.9668064782. The cubic root of 990170000 is about 996.7125377684.

The spelling of 990170000 in words is "nine hundred ninety million, one hundred seventy thousand".