22227840 has 192 divisors, whose sum is σ = 81628560. Its totient is φ = 5554176.

The previous prime is 22227827. The next prime is 22227847. The reversal of 22227840 is 4872222.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22227847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97807 + ... + 98033.

Almost surely, 2^22227840 is an apocalyptic number.

22227840 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 22227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40814280).

22227840 is an abundant number, since it is smaller than the sum of its proper divisors (59400720).

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

22227840 is a wasteful number, since it uses less digits than its factorization.

22227840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22227840 is about 4714.6410255713. The cubic root of 22227840 is about 281.1679108576.

The spelling of 22227840 in words is "twenty-two million, two hundred twenty-seven thousand, eight hundred forty".