8071982780 has 48 divisors (see below), whose sum is σ = 17077919040. Its totient is φ = 3204715008.

The previous prime is 8071982777. The next prime is 8071982783. The reversal of 8071982780 is 872891708.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8071982777) and next prime (8071982783).

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8071982783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2513816 + ... + 2517024.

It is an arithmetic number, because the mean of its divisors is an integer number (355789980).

Almost surely, 2^8071982780 is an apocalyptic number.

It is an amenable number.

8071982780 is an abundant number, since it is smaller than the sum of its proper divisors (9005936260).

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

8071982780 is a wasteful number, since it uses less digits than its factorization.

8071982780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 4116 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 50.

The square root of 8071982780 is about 89844.2139483673. The cubic root of 8071982780 is about 2005.9806630085.

The spelling of 8071982780 in words is "eight billion, seventy-one million, nine hundred eighty-two thousand, seven hundred eighty".