87285858580 has 24 divisors (see below), whose sum is σ = 187771043880. Its totient is φ = 34062773760.

The previous prime is 87285858559. The next prime is 87285858581. The reversal of 87285858580 is 8585858278.

It can be written as a sum of positive squares in 4 ways, for example, as 1964616976 + 85321241604 = 44324^2 + 292098^2 .

It is a super-2 number, since 2×87285858580² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87285858581) 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, 53222265 + ... + 53223904.

It is an arithmetic number, because the mean of its divisors is an integer number (7823793495).

Almost surely, 2^87285858580 is an apocalyptic number.

It is an amenable number.

87285858580 is an abundant number, since it is smaller than the sum of its proper divisors (100485185300).

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

87285858580 is a wasteful number, since it uses less digits than its factorization.

87285858580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106446219 (or 106446217 counting only the distinct ones).

The product of its (nonzero) digits is 57344000, while the sum is 64.

The spelling of 87285858580 in words is "eighty-seven billion, two hundred eighty-five million, eight hundred fifty-eight thousand, five hundred eighty".