872820530 has 16 divisors (see below), whose sum is σ = 1590007104. Its totient is φ = 344921520.

The previous prime is 872820497. The next prime is 872820539. The reversal of 872820530 is 35028278.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (872820539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524966 + ... + 526625.

It is an arithmetic number, because the mean of its divisors is an integer number (99375444).

Almost surely, 2^872820530 is an apocalyptic number.

872820530 is a deficient number, since it is larger than the sum of its proper divisors (717186574).

872820530 is a wasteful number, since it uses less digits than its factorization.

872820530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051681.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 872820530 is about 29543.5361796790. The cubic root of 872820530 is about 955.6708023419.

The spelling of 872820530 in words is "eight hundred seventy-two million, eight hundred twenty thousand, five hundred thirty".