8821980 has 144 divisors (see below), whose sum is σ = 30028320. Its totient is φ = 2142720.

The previous prime is 8821979. The next prime is 8821991. The reversal of 8821980 is 891288.

8821980 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8821980² = 155654662240800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 284565 + ... + 284595.

It is an arithmetic number, because the mean of its divisors is an integer number (208530).

Almost surely, 2^8821980 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 8821980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15014160).

8821980 is an abundant number, since it is smaller than the sum of its proper divisors (21206340).

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

8821980 is a wasteful number, since it uses less digits than its factorization.

8821980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 8821980 is about 2970.1818126169. The cubic root of 8821980 is about 206.6277704577.

It can be divided in two parts, 8821 and 980, that added together give a square (9801 = 99²).

The spelling of 8821980 in words is "eight million, eight hundred twenty-one thousand, nine hundred eighty".