8821440 has 112 divisors (see below), whose sum is σ = 31150560. Its totient is φ = 2350080.

The previous prime is 8821427. The next prime is 8821457. The reversal of 8821440 is 441288.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8130 + ... + 9150.

It is an arithmetic number, because the mean of its divisors is an integer number (278130).

Almost surely, 2^8821440 is an apocalyptic number.

8821440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8821440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15575280).

8821440 is an abundant number, since it is smaller than the sum of its proper divisors (22329120).

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

8821440 is a wasteful number, since it uses less digits than its factorization.

8821440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 8821440 is about 2970.0909076996. The cubic root of 8821440 is about 206.6235544248.

It can be divided in two parts, 8821 and 440, that added together give a cube (9261 = 21³).

The spelling of 8821440 in words is "eight million, eight hundred twenty-one thousand, four hundred forty".