872221020 has 96 divisors (see below), whose sum is σ = 2679989760. Its totient is φ = 210197760.

The previous prime is 872220983. The next prime is 872221043. The reversal of 872221020 is 20122278.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 110361 + ... + 117999.

It is an arithmetic number, because the mean of its divisors is an integer number (27916560).

Almost surely, 2^872221020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 872221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339994880).

872221020 is an abundant number, since it is smaller than the sum of its proper divisors (1807768740).

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

872221020 is a wasteful number, since it uses less digits than its factorization.

872221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7835 (or 7833 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 872221020 is about 29533.3882241777. The cubic root of 872221020 is about 955.4519465713.

Adding to 872221020 its reverse (20122278), we get a palindrome (892343298).

The spelling of 872221020 in words is "eight hundred seventy-two million, two hundred twenty-one thousand, twenty".