7871587880 has 32 divisors (see below), whose sum is σ = 19073464200. Its totient is φ = 2906432256.

The previous prime is 7871587879. The next prime is 7871587891. The reversal of 7871587880 is 887851787.

It can be written as a sum of positive squares in 4 ways, for example, as 7139236036 + 732351844 = 84494^2 + 27062^2 .

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 7 ways as a sum of consecutive naturals, for example, 7568315 + ... + 7569354.

Almost surely, 2^7871587880 is an apocalyptic number.

It is an amenable number.

7871587880 is an abundant number, since it is smaller than the sum of its proper divisors (11201876320).

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

7871587880 is a wasteful number, since it uses less digits than its factorization.

7871587880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15137693 (or 15137689 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 59.

The square root of 7871587880 is about 88721.9695453161. The cubic root of 7871587880 is about 1989.2412180845.

The spelling of 7871587880 in words is "seven billion, eight hundred seventy-one million, five hundred eighty-seven thousand, eight hundred eighty".