8213197884 has 12 divisors (see below), whose sum is σ = 19164128424. Its totient is φ = 2737732624.

The previous prime is 8213197847. The next prime is 8213197901. The reversal of 8213197884 is 4887913128.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342216567 + ... + 342216590.

It is an arithmetic number, because the mean of its divisors is an integer number (1597010702).

Almost surely, 2^8213197884 is an apocalyptic number.

It is an amenable number.

8213197884 is an abundant number, since it is smaller than the sum of its proper divisors (10950930540).

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

8213197884 is a wasteful number, since it uses less digits than its factorization.

8213197884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684433164 (or 684433162 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 8213197884 is about 90626.6952062139. The cubic root of 8213197884 is about 2017.6109621749.

The spelling of 8213197884 in words is "eight billion, two hundred thirteen million, one hundred ninety-seven thousand, eight hundred eighty-four".