22423040 has 80 divisors (see below), whose sum is σ = 56715120. Its totient is φ = 8478720.

The previous prime is 22423019. The next prime is 22423043. The reversal of 22423040 is 4032422.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22423043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48410 + ... + 48870.

It is an arithmetic number, because the mean of its divisors is an integer number (708939).

Almost surely, 2^22423040 is an apocalyptic number.

22423040 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 22423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28357560).

22423040 is an abundant number, since it is smaller than the sum of its proper divisors (34292080).

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

22423040 is an equidigital number, since it uses as much as digits as its factorization.

22423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22423040 is about 4735.2972451579. The cubic root of 22423040 is about 281.9885648332.

Adding to 22423040 its reverse (4032422), we get a palindrome (26455462).

The spelling of 22423040 in words is "twenty-two million, four hundred twenty-three thousand, forty".