7990983780 has 48 divisors (see below), whose sum is σ = 24095891904. Its totient is φ = 1967011200.

The previous prime is 7990983709. The next prime is 7990983799. The reversal of 7990983780 is 873890997.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5121646 + ... + 5123205.

It is an arithmetic number, because the mean of its divisors is an integer number (501997748).

Almost surely, 2^7990983780 is an apocalyptic number.

It is an amenable number.

7990983780 is an abundant number, since it is smaller than the sum of its proper divisors (16104908124).

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

7990983780 is a wasteful number, since it uses less digits than its factorization.

7990983780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244876 (or 10244874 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 60.

The square root of 7990983780 is about 89392.3026887662. The cubic root of 7990983780 is about 1999.2483658918.

The spelling of 7990983780 in words is "seven billion, nine hundred ninety million, nine hundred eighty-three thousand, seven hundred eighty".