22280700 has 144 divisors (see below), whose sum is σ = 72182880. Its totient is φ = 5268480.

The previous prime is 22280689. The next prime is 22280707. The reversal of 22280700 is 708222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22280707) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 113002 + ... + 113198.

It is an arithmetic number, because the mean of its divisors is an integer number (501270).

Almost surely, 2^22280700 is an apocalyptic number.

22280700 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 22280700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36091440).

22280700 is an abundant number, since it is smaller than the sum of its proper divisors (49902180).

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

22280700 is a wasteful number, since it uses less digits than its factorization.

22280700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 22280700 is about 4720.2436377797. The cubic root of 22280700 is about 281.3906161044.

Adding to 22280700 its reverse (708222), we get a palindrome (22988922).

The spelling of 22280700 in words is "twenty-two million, two hundred eighty thousand, seven hundred".