7999840000 has 90 divisors (see below), whose sum is σ = 19954550000. Its totient is φ = 3199872000.

The previous prime is 7999839997. The next prime is 7999840003. The reversal of 7999840000 is 489997.

It is an interprime number because it is at equal distance from previous prime (7999839997) and next prime (7999840003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999840003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 135001 + ... + 184999.

Almost surely, 2^7999840000 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 7999840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9977275000).

7999840000 is an abundant number, since it is smaller than the sum of its proper divisors (11954710000).

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

7999840000 is an frugal number, since it uses more digits than its factorization.

7999840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50035 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 7999840000 is about 89441.8246683284. The cubic root of 7999840000 is about 1999.9866665778.

The spelling of 7999840000 in words is "seven billion, nine hundred ninety-nine million, eight hundred forty thousand".