8991420108 has 48 divisors (see below), whose sum is σ = 23319104256. Its totient is φ = 2673261760.

The previous prime is 8991420029. The next prime is 8991420127. The reversal of 8991420108 is 8010241998.

It is a self number, because there is not a number n which added to its sum of digits gives 8991420108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635616 + ... + 649607.

It is an arithmetic number, because the mean of its divisors is an integer number (485814672).

Almost surely, 2^8991420108 is an apocalyptic number.

It is an amenable number.

8991420108 is an abundant number, since it is smaller than the sum of its proper divisors (14327684148).

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

8991420108 is a wasteful number, since it uses less digits than its factorization.

8991420108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285294 (or 1285292 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 8991420108 is about 94823.0990212828. The cubic root of 8991420108 is about 2079.4226167988.

The spelling of 8991420108 in words is "eight billion, nine hundred ninety-one million, four hundred twenty thousand, one hundred eight".