8821072 has 20 divisors (see below), whose sum is σ = 18405940. Its totient is φ = 4071168.

The previous prime is 8821067. The next prime is 8821091. The reversal of 8821072 is 2701288.

It can be written as a sum of positive squares in 2 ways, for example, as 3549456 + 5271616 = 1884^2 + 2296^2 .

It is a super-2 number, since 2×8821072² = 155622622458368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8821072.

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, 20997 + ... + 21412.

It is an arithmetic number, because the mean of its divisors is an integer number (920297).

Almost surely, 2^8821072 is an apocalyptic number.

It is an amenable number.

8821072 is an abundant number, since it is smaller than the sum of its proper divisors (9584868).

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

8821072 is a wasteful number, since it uses less digits than its factorization.

8821072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42430 (or 42424 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 8821072 is about 2970.0289560878. The cubic root of 8821072 is about 206.6206811779.

The spelling of 8821072 in words is "eight million, eight hundred twenty-one thousand, seventy-two".