22432320 has 84 divisors (see below), whose sum is σ = 77167740. Its totient is φ = 5981184.

The previous prime is 22432307. The next prime is 22432321. The reversal of 22432320 is 2323422.

It can be written as a sum of positive squares in 2 ways, for example, as 10653696 + 11778624 = 3264^2 + 3432^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22432293 and 22432302.

It is not an unprimeable number, because it can be changed into a prime (22432321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015 + ... + 6774.

Almost surely, 2^22432320 is an apocalyptic number.

22432320 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 22432320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38583870).

22432320 is an abundant number, since it is smaller than the sum of its proper divisors (54735420).

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

22432320 is a wasteful number, since it uses less digits than its factorization.

22432320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7812 (or 7799 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 22432320 is about 4736.2770189253. The cubic root of 22432320 is about 282.0274607331.

Adding to 22432320 its reverse (2323422), we get a palindrome (24755742).

The spelling of 22432320 in words is "twenty-two million, four hundred thirty-two thousand, three hundred twenty".