23442240 has 56 divisors (see below), whose sum is σ = 74432160. Its totient is φ = 6251008.

The previous prime is 23442229. The next prime is 23442241. The reversal of 23442240 is 4224432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23442241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 13169.

Almost surely, 2^23442240 is an apocalyptic number.

23442240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23442240 is an abundant number, since it is smaller than the sum of its proper divisors (50989920).

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

23442240 is a wasteful number, since it uses less digits than its factorization.

23442240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24439 (or 24429 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 23442240 is about 4841.7187031053. The cubic root of 23442240 is about 286.1978515886.

Adding to 23442240 its reverse (4224432), we get a palindrome (27666672).

The spelling of 23442240 in words is "twenty-three million, four hundred forty-two thousand, two hundred forty".