99823290 has 128 divisors (see below), whose sum is σ = 285120000. Its totient is φ = 22353408.

The previous prime is 99823279. The next prime is 99823291. The reversal of 99823290 is 9232899.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99823291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 915756 + ... + 915864.

It is an arithmetic number, because the mean of its divisors is an integer number (2227500).

Almost surely, 2^99823290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99823290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142560000).

99823290 is an abundant number, since it is smaller than the sum of its proper divisors (185296710).

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

99823290 is a wasteful number, since it uses less digits than its factorization.

99823290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 99823290 is about 9991.1605932444. The cubic root of 99823290 is about 463.8853171040.

The spelling of 99823290 in words is "ninety-nine million, eight hundred twenty-three thousand, two hundred ninety".