22423240 has 64 divisors (see below), whose sum is σ = 58786560. Its totient is φ = 7537920.

The previous prime is 22423231. The next prime is 22423259. The reversal of 22423240 is 4232422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14085 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (918540).

Almost surely, 2^22423240 is an apocalyptic number.

22423240 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 22423240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29393280).

22423240 is an abundant number, since it is smaller than the sum of its proper divisors (36363320).

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

22423240 is a wasteful number, since it uses less digits than its factorization.

22423240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22423240 is about 4735.3183631093. The cubic root of 22423240 is about 281.9894032200.

Adding to 22423240 its reverse (4232422), we get a palindrome (26655662).

It can be divided in two parts, 2 and 2423240, that added together give a palindrome (2423242).

The spelling of 22423240 in words is "twenty-two million, four hundred twenty-three thousand, two hundred forty".