22928220 has 144 divisors (see below), whose sum is σ = 82188288. Its totient is φ = 5063040.

The previous prime is 22928219. The next prime is 22928221. The reversal of 22928220 is 2282922.

It is an interprime number because it is at equal distance from previous prime (22928219) and next prime (22928221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22928221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38767 + ... + 39353.

It is an arithmetic number, because the mean of its divisors is an integer number (570752).

Almost surely, 2^22928220 is an apocalyptic number.

22928220 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 22928220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41094144).

22928220 is an abundant number, since it is smaller than the sum of its proper divisors (59260068).

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

22928220 is a wasteful number, since it uses less digits than its factorization.

22928220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22928220 is about 4788.3420930422. The cubic root of 22928220 is about 284.0905450895.

The spelling of 22928220 in words is "twenty-two million, nine hundred twenty-eight thousand, two hundred twenty".