8687439056 has 30 divisors (see below), whose sum is σ = 17416349010. Its totient is φ = 4192966848.

The previous prime is 8687439017. The next prime is 8687439071. The reversal of 8687439056 is 6509347868.

It can be written as a sum of positive squares in only one way, i.e., 7489171600 + 1198267456 = 86540^2 + 34616^2 .

It is a super-2 number, since 2×8687439056² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8687438992 and 8687439010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2005565 + ... + 2009891.

It is an arithmetic number, because the mean of its divisors is an integer number (580544967).

Almost surely, 2^8687439056 is an apocalyptic number.

It is an amenable number.

8687439056 is an abundant number, since it is smaller than the sum of its proper divisors (8728909954).

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

8687439056 is an frugal number, since it uses more digits than its factorization.

8687439056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8691 (or 4358 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The square root of 8687439056 is about 93206.4324818840. The cubic root of 8687439056 is about 2055.7198225810.

The spelling of 8687439056 in words is "eight billion, six hundred eighty-seven million, four hundred thirty-nine thousand, fifty-six".