22008780 has 96 divisors (see below), whose sum is σ = 69854400. Its totient is φ = 5750784.

The previous prime is 22008751. The next prime is 22008781. The reversal of 22008780 is 8780022.

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

It is not an unprimeable number, because it can be changed into a prime (22008781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28236 + ... + 29004.

It is an arithmetic number, because the mean of its divisors is an integer number (727650).

Almost surely, 2^22008780 is an apocalyptic number.

22008780 is a gapful number since it is divisible by the number (20) 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 22008780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34927200).

22008780 is an abundant number, since it is smaller than the sum of its proper divisors (47845620).

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

22008780 is a wasteful number, since it uses less digits than its factorization.

22008780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 22008780 is about 4691.3516176045. The cubic root of 22008780 is about 280.2412037220.

The spelling of 22008780 in words is "twenty-two million, eight thousand, seven hundred eighty".