872820465858 has 48 divisors (see below), whose sum is σ = 2092086988992. Its totient is φ = 260765820000.

The previous prime is 872820465857. The next prime is 872820466027. The reversal of 872820465858 is 858564028278.

872820465858 is a `hidden beast` number, since 8 + 7 + 2 + 8 + 2 + 0 + 46 + 585 + 8 = 666.

It is a super-2 number, since 2×872820465858² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 872820465795 and 872820465804.

It is not an unprimeable number, because it can be changed into a prime (872820465851) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 31029493 + ... + 31057608.

It is an arithmetic number, because the mean of its divisors is an integer number (43585145604).

Almost surely, 2^872820465858 is an apocalyptic number.

872820465858 is an abundant number, since it is smaller than the sum of its proper divisors (1219266523134).

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

872820465858 is a wasteful number, since it uses less digits than its factorization.

872820465858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62087191 (or 62087188 counting only the distinct ones).

The product of its (nonzero) digits is 68812800, while the sum is 63.

The spelling of 872820465858 in words is "eight hundred seventy-two billion, eight hundred twenty million, four hundred sixty-five thousand, eight hundred fifty-eight".