7971867980 has 24 divisors (see below), whose sum is σ = 16743914880. Its totient is φ = 3188177280.

The previous prime is 7971867979. The next prime is 7971867989. The reversal of 7971867980 is 897681797.

It is not an unprimeable number, because it can be changed into a prime (7971867989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89861 + ... + 154979.

It is an arithmetic number, because the mean of its divisors is an integer number (697663120).

Almost surely, 2^7971867980 is an apocalyptic number.

It is an amenable number.

7971867980 is an abundant number, since it is smaller than the sum of its proper divisors (8772046900).

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

7971867980 is a wasteful number, since it uses less digits than its factorization.

7971867980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71249 (or 71247 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 62.

The square root of 7971867980 is about 89285.3178299770. The cubic root of 7971867980 is about 1997.6529116657.

The spelling of 7971867980 in words is "seven billion, nine hundred seventy-one million, eight hundred sixty-seven thousand, nine hundred eighty".