223444440 has 128 divisors (see below), whose sum is σ = 748324800. Its totient is φ = 59304960.

The previous prime is 223444409. The next prime is 223444453. The reversal of 223444440 is 44444322.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 337710 + ... + 338370.

Almost surely, 2^223444440 is an apocalyptic number.

223444440 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 223444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374162400).

223444440 is an abundant number, since it is smaller than the sum of its proper divisors (524880360).

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

223444440 is a wasteful number, since it uses less digits than its factorization.

223444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

The square root of 223444440 is about 14948.0580678562. The cubic root of 223444440 is about 606.8152931884.

Adding to 223444440 its reverse (44444322), we get a palindrome (267888762).

The spelling of 223444440 in words is "two hundred twenty-three million, four hundred forty-four thousand, four hundred forty".