8320140280 has 96 divisors (see below), whose sum is σ = 19936206000. Its totient is φ = 3124380672.

The previous prime is 8320140277. The next prime is 8320140307. The reversal of 8320140280 is 820410238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1629171 + ... + 1634269.

Almost surely, 2^8320140280 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 8320140280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9968103000).

8320140280 is an abundant number, since it is smaller than the sum of its proper divisors (11616065720).

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

8320140280 is a wasteful number, since it uses less digits than its factorization.

8320140280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261 (or 5238 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 8320140280 is about 91214.8029653082. The cubic root of 8320140280 is about 2026.3301958777.

The spelling of 8320140280 in words is "eight billion, three hundred twenty million, one hundred forty thousand, two hundred eighty".