99880000 has 140 divisors (see below), whose sum is σ = 271375632. Its totient is φ = 36160000.

The previous prime is 99879991. The next prime is 99880003. The reversal of 99880000 is 8899.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99880003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 439887 + ... + 440113.

Almost surely, 2^99880000 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 99880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135687816).

99880000 is an abundant number, since it is smaller than the sum of its proper divisors (171495632).

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

99880000 is a wasteful number, since it uses less digits than its factorization.

99880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 99880000 is about 9993.9981989192. The cubic root of 99880000 is about 463.9731454930.

Adding to 99880000 its reverse (8899), we get a palindrome (99888899).

The spelling of 99880000 in words is "ninety-nine million, eight hundred eighty thousand".