87587028722 has 6 divisors (see below), whose sum is σ = 131381170893. Its totient is φ = 43793305092.

The previous prime is 87587028707. The next prime is 87587028731. The reversal of 87587028722 is 22782078578.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72082047361 + 15504981361 = 268481^2 + 124519^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=209269.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 313904 + ... + 523172.

Almost surely, 2^87587028722 is an apocalyptic number.

87587028722 is a deficient number, since it is larger than the sum of its proper divisors (43794142171).

87587028722 is an frugal number, since it uses more digits than its factorization.

87587028722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418540 (or 209271 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 56.

The spelling of 87587028722 in words is "eighty-seven billion, five hundred eighty-seven million, twenty-eight thousand, seven hundred twenty-two".