99940008 has 96 divisors (see below), whose sum is σ = 307800000. Its totient is φ = 26869248.

The previous prime is 99940007. The next prime is 99940013. The reversal of 99940008 is 80004999.

It is a Cunningham number, because it is equal to 9997²-1.

It is not an unprimeable number, because it can be changed into a prime (99940007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17493 + ... + 22491.

It is an arithmetic number, because the mean of its divisors is an integer number (3206250).

Almost surely, 2^99940008 is an apocalyptic number.

99940008 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99940008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153900000).

99940008 is an abundant number, since it is smaller than the sum of its proper divisors (207859992).

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

99940008 is a wasteful number, since it uses less digits than its factorization.

99940008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 99940008 is about 9996.9999499850. Note that the first 4 decimals coincide. The cubic root of 99940008 is about 464.0660453946.

The spelling of 99940008 in words is "ninety-nine million, nine hundred forty thousand, eight".