22207280 has 40 divisors (see below), whose sum is σ = 52228800. Its totient is φ = 8780288.

The previous prime is 22207279. The next prime is 22207303. The reversal of 22207280 is 8270222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5561 + ... + 8679.

It is an arithmetic number, because the mean of its divisors is an integer number (1305720).

Almost surely, 2^22207280 is an apocalyptic number.

22207280 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 22207280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26114400).

22207280 is an abundant number, since it is smaller than the sum of its proper divisors (30021520).

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

22207280 is a wasteful number, since it uses less digits than its factorization.

22207280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 22207280 is about 4712.4600794065. The cubic root of 22207280 is about 281.0811938469.

The spelling of 22207280 in words is "twenty-two million, two hundred seven thousand, two hundred eighty".