223420240 has 40 divisors (see below), whose sum is σ = 546795360. Its totient is φ = 84663936.

The previous prime is 223420231. The next prime is 223420271. The reversal of 223420240 is 42024322.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

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, 71974 + ... + 75013.

It is an arithmetic number, because the mean of its divisors is an integer number (13669884).

Almost surely, 2^223420240 is an apocalyptic number.

223420240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223420240 is an abundant number, since it is smaller than the sum of its proper divisors (323375120).

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

223420240 is a wasteful number, since it uses less digits than its factorization.

223420240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147019 (or 147013 counting only the distinct ones).

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

The square root of 223420240 is about 14947.2485762431. The cubic root of 223420240 is about 606.7933854899.

Adding to 223420240 its reverse (42024322), we get a palindrome (265444562).

The spelling of 223420240 in words is "two hundred twenty-three million, four hundred twenty thousand, two hundred forty".