22173280 has 48 divisors (see below), whose sum is σ = 52814160. Its totient is φ = 8796672.

The previous prime is 22173271. The next prime is 22173301. The reversal of 22173280 is 8237122.

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, 21742 + ... + 22738.

It is an arithmetic number, because the mean of its divisors is an integer number (1100295).

Almost surely, 2^22173280 is an apocalyptic number.

22173280 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 22173280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26407080).

22173280 is an abundant number, since it is smaller than the sum of its proper divisors (30640880).

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

22173280 is a wasteful number, since it uses less digits than its factorization.

22173280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 22173280 is about 4708.8512399523. The cubic root of 22173280 is about 280.9376727137.

The spelling of 22173280 in words is "twenty-two million, one hundred seventy-three thousand, two hundred eighty".