8189899872 has 192 divisors, whose sum is σ = 28380409344. Its totient is φ = 2002083840.

The previous prime is 8189899849. The next prime is 8189899903. The reversal of 8189899872 is 2789989818.

It is a junction number, because it is equal to n+sod(n) for n = 8189899797 and 8189899806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93078 + ... + 158250.

It is an arithmetic number, because the mean of its divisors is an integer number (147814632).

Almost surely, 2^8189899872 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 8189899872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14190204672).

8189899872 is an abundant number, since it is smaller than the sum of its proper divisors (20190509472).

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

8189899872 is a wasteful number, since it uses less digits than its factorization.

8189899872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65221 (or 65213 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 69.

The square root of 8189899872 is about 90498.0655704861. The cubic root of 8189899872 is about 2015.7013997785.

The spelling of 8189899872 in words is "eight billion, one hundred eighty-nine million, eight hundred ninety-nine thousand, eight hundred seventy-two".