99870084 has 84 divisors (see below), whose sum is σ = 271304460. Its totient is φ = 32114880.

The previous prime is 99870083. The next prime is 99870097. The reversal of 99870084 is 48007899.

It can be written as a sum of positive squares in 2 ways, for example, as 74649600 + 25220484 = 8640^2 + 5022^2 .

It is not an unprimeable number, because it can be changed into a prime (99870083) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 83974 + ... + 85154.

It is an arithmetic number, because the mean of its divisors is an integer number (3229815).

Almost surely, 2^99870084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99870084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135652230).

99870084 is an abundant number, since it is smaller than the sum of its proper divisors (171434376).

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

99870084 is a wasteful number, since it uses less digits than its factorization.

99870084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 99870084 is about 9993.5020888575. The cubic root of 99870084 is about 463.9577907006.

The spelling of 99870084 in words is "ninety-nine million, eight hundred seventy thousand, eighty-four".