99491328 has 100 divisors (see below), whose sum is σ = 297079200. Its totient is φ = 33149952.

The previous prime is 99491321. The next prime is 99491341. The reversal of 99491328 is 82319499.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99491321) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40273 + ... + 42671.

It is an arithmetic number, because the mean of its divisors is an integer number (2970792).

Almost surely, 2^99491328 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 99491328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148539600).

99491328 is an abundant number, since it is smaller than the sum of its proper divisors (197587872).

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

99491328 is an equidigital number, since it uses as much as digits as its factorization.

99491328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429 (or 2404 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 99491328 is about 9974.5339740762. The cubic root of 99491328 is about 463.3705297099.

The spelling of 99491328 in words is "ninety-nine million, four hundred ninety-one thousand, three hundred twenty-eight".