8399020320 has 288 divisors, whose sum is σ = 29468904192. Its totient is φ = 2177335296.

The previous prime is 8399020303. The next prime is 8399020349. The reversal of 8399020320 is 230209938.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 13061919 + ... + 13062561.

It is an arithmetic number, because the mean of its divisors is an integer number (102322584).

Almost surely, 2^8399020320 is an apocalyptic number.

8399020320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8399020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14734452096).

8399020320 is an abundant number, since it is smaller than the sum of its proper divisors (21069883872).

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

8399020320 is a wasteful number, since it uses less digits than its factorization.

8399020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 8399020320 is about 91646.1691507070. The cubic root of 8399020320 is about 2032.7136833205.

The spelling of 8399020320 in words is "eight billion, three hundred ninety-nine million, twenty thousand, three hundred twenty".