99870834 has 64 divisors (see below), whose sum is σ = 238049280. Its totient is φ = 27338880.

The previous prime is 99870833. The next prime is 99870857. The reversal of 99870834 is 43807899.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99870833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101107 + ... + 102089.

It is an arithmetic number, because the mean of its divisors is an integer number (3719520).

Almost surely, 2^99870834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99870834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119024640).

99870834 is an abundant number, since it is smaller than the sum of its proper divisors (138178446).

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

99870834 is a wasteful number, since it uses less digits than its factorization.

99870834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 99870834 is about 9993.5396131701. The cubic root of 99870834 is about 463.9589521011.

The spelling of 99870834 in words is "ninety-nine million, eight hundred seventy thousand, eight hundred thirty-four".