22271280 has 80 divisors (see below), whose sum is σ = 70066944. Its totient is φ = 5850880.

The previous prime is 22271273. The next prime is 22271281. The reversal of 22271280 is 8217222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22271280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22271281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16387 + ... + 17693.

Almost surely, 2^22271280 is an apocalyptic number.

22271280 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 22271280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35033472).

22271280 is an abundant number, since it is smaller than the sum of its proper divisors (47795664).

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

22271280 is a wasteful number, since it uses less digits than its factorization.

22271280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22271280 is about 4719.2457024402. The cubic root of 22271280 is about 281.3509543755.

The spelling of 22271280 in words is "twenty-two million, two hundred seventy-one thousand, two hundred eighty".