223449720 has 128 divisors (see below), whose sum is σ = 726243840. Its totient is φ = 54673920.

The previous prime is 223449701. The next prime is 223449731. The reversal of 223449720 is 27944322.

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 31 ways as a sum of consecutive naturals, for example, 353805 + ... + 354435.

It is an arithmetic number, because the mean of its divisors is an integer number (5673780).

Almost surely, 2^223449720 is an apocalyptic number.

223449720 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 223449720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363121920).

223449720 is an abundant number, since it is smaller than the sum of its proper divisors (502794120).

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

223449720 is a wasteful number, since it uses less digits than its factorization.

223449720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 223449720 is about 14948.2346783826. The cubic root of 223449720 is about 606.8200728397.

The spelling of 223449720 in words is "two hundred twenty-three million, four hundred forty-nine thousand, seven hundred twenty".