8991598408 has 16 divisors (see below), whose sum is σ = 18156112380. Its totient is φ = 4149968448.

The previous prime is 8991598331. The next prime is 8991598409. The reversal of 8991598408 is 8048951998.

8991598408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8140009284 + 851589124 = 90222^2 + 29182^2 .

It is not an unprimeable number, because it can be changed into a prime (8991598409) 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 3 ways as a sum of consecutive naturals, for example, 43228735 + ... + 43228942.

Almost surely, 2^8991598408 is an apocalyptic number.

It is an amenable number.

8991598408 is an abundant number, since it is smaller than the sum of its proper divisors (9164513972).

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

8991598408 is a wasteful number, since it uses less digits than its factorization.

8991598408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86457696 (or 86457692 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 61.

The square root of 8991598408 is about 94824.0391883830. The cubic root of 8991598408 is about 2079.4363617022.

The spelling of 8991598408 in words is "eight billion, nine hundred ninety-one million, five hundred ninety-eight thousand, four hundred eight".