223523440 has 40 divisors (see below), whose sum is σ = 593935200. Its totient is φ = 76636416.

The previous prime is 223523383. The next prime is 223523441. The reversal of 223523440 is 44325322.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223523441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199015 + ... + 200134.

It is an arithmetic number, because the mean of its divisors is an integer number (14848380).

Almost surely, 2^223523440 is an apocalyptic number.

223523440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223523440 is an abundant number, since it is smaller than the sum of its proper divisors (370411760).

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

223523440 is a wasteful number, since it uses less digits than its factorization.

223523440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399169 (or 399163 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 223523440 is about 14950.7003180453. The cubic root of 223523440 is about 606.8867990471.

Adding to 223523440 its reverse (44325322), we get a palindrome (267848762).

The spelling of 223523440 in words is "two hundred twenty-three million, five hundred twenty-three thousand, four hundred forty".