872584820 has 12 divisors (see below), whose sum is σ = 1832428164. Its totient is φ = 349033920.

The previous prime is 872584813. The next prime is 872584847. The reversal of 872584820 is 28485278.

It can be written as a sum of positive squares in 2 ways, for example, as 417957136 + 454627684 = 20444^2 + 21322^2 .

It is a super-2 number, since 2×872584820² = 1522808536188864800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21814601 + ... + 21814640.

It is an arithmetic number, because the mean of its divisors is an integer number (152702347).

Almost surely, 2^872584820 is an apocalyptic number.

It is an amenable number.

872584820 is an abundant number, since it is smaller than the sum of its proper divisors (959843344).

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

872584820 is a wasteful number, since it uses less digits than its factorization.

872584820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43629250 (or 43629248 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 44.

The square root of 872584820 is about 29539.5467128390. The cubic root of 872584820 is about 955.5847665389.

The spelling of 872584820 in words is "eight hundred seventy-two million, five hundred eighty-four thousand, eight hundred twenty".