22280100 has 72 divisors (see below), whose sum is σ = 67287360. Its totient is φ = 5681280.

The previous prime is 22280099. The next prime is 22280117. The reversal of 22280100 is 108222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22280100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5286 + ... + 8514.

Almost surely, 2^22280100 is an apocalyptic number.

22280100 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 22280100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33643680).

22280100 is an abundant number, since it is smaller than the sum of its proper divisors (45007260).

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

22280100 is a wasteful number, since it uses less digits than its factorization.

22280100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269 (or 3262 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 22280100 is about 4720.1800813105. The cubic root of 22280100 is about 281.3880902130.

Adding to 22280100 its reverse (108222), we get a palindrome (22388322).

The spelling of 22280100 in words is "twenty-two million, two hundred eighty thousand, one hundred".