7987415880 has 128 divisors (see below), whose sum is σ = 24466406400. Its totient is φ = 2085338112.

The previous prime is 7987415869. The next prime is 7987415897. The reversal of 7987415880 is 885147897.

It is a self number, because there is not a number n which added to its sum of digits gives 7987415880.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3859486 + ... + 3861554.

It is an arithmetic number, because the mean of its divisors is an integer number (191143800).

Almost surely, 2^7987415880 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 7987415880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12233203200).

7987415880 is an abundant number, since it is smaller than the sum of its proper divisors (16478990520).

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

7987415880 is a wasteful number, since it uses less digits than its factorization.

7987415880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743 (or 2739 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 57.

The square root of 7987415880 is about 89372.3440444526. The cubic root of 7987415880 is about 1998.9507729909.

The spelling of 7987415880 in words is "seven billion, nine hundred eighty-seven million, four hundred fifteen thousand, eight hundred eighty".