223405240 has 32 divisors (see below), whose sum is σ = 503405280. Its totient is φ = 89229952.

The previous prime is 223405213. The next prime is 223405243. The reversal of 223405240 is 42504322.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223405243) 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, 25962 + ... + 33478.

It is an arithmetic number, because the mean of its divisors is an integer number (15731415).

Almost surely, 2^223405240 is an apocalyptic number.

223405240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223405240 is an abundant number, since it is smaller than the sum of its proper divisors (280000040).

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

223405240 is a wasteful number, since it uses less digits than its factorization.

223405240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8271 (or 8267 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 223405240 is about 14946.7468032345. The cubic root of 223405240 is about 606.7798055438.

Adding to 223405240 its reverse (42504322), we get a palindrome (265909562).

The spelling of 223405240 in words is "two hundred twenty-three million, four hundred five thousand, two hundred forty".