84820395900 has 144 divisors (see below), whose sum is σ = 258621447168. Its totient is φ = 21420960000.

The previous prime is 84820395889. The next prime is 84820395917. The reversal of 84820395900 is 959302848.

It is a self number, because there is not a number n which added to its sum of digits gives 84820395900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 636045 + ... + 757755.

It is an arithmetic number, because the mean of its divisors is an integer number (1795982272).

Almost surely, 2^84820395900 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 84820395900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129310723584).

84820395900 is an abundant number, since it is smaller than the sum of its proper divisors (173801051268).

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

84820395900 is a wasteful number, since it uses less digits than its factorization.

84820395900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121852 (or 121845 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 84820395900 in words is "eighty-four billion, eight hundred twenty million, three hundred ninety-five thousand, nine hundred".