22508280 has 80 divisors (see below), whose sum is σ = 75663720. Its totient is φ = 6001344.

The previous prime is 22508279. The next prime is 22508287. The reversal of 22508280 is 8280522.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22508287) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 234 + ... + 6713.

Almost surely, 2^22508280 is an apocalyptic number.

22508280 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 22508280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37831860).

22508280 is an abundant number, since it is smaller than the sum of its proper divisors (53155440).

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

22508280 is a wasteful number, since it uses less digits than its factorization.

22508280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970 (or 6957 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 22508280 is about 4744.2891986050. The cubic root of 22508280 is about 282.3454345431.

The spelling of 22508280 in words is "twenty-two million, five hundred eight thousand, two hundred eighty".