223456240 has 80 divisors (see below), whose sum is σ = 601390080. Its totient is φ = 75628800.

The previous prime is 223456229. The next prime is 223456243. The reversal of 223456240 is 42654322.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 223456199 and 223456208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223456243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41715 + ... + 46765.

It is an arithmetic number, because the mean of its divisors is an integer number (7517376).

Almost surely, 2^223456240 is an apocalyptic number.

223456240 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 223456240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300695040).

223456240 is an abundant number, since it is smaller than the sum of its proper divisors (377933840).

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

223456240 is a wasteful number, since it uses less digits than its factorization.

223456240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150 (or 5144 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 223456240 is about 14948.4527627444. The cubic root of 223456240 is about 606.8259748810.

The spelling of 223456240 in words is "two hundred twenty-three million, four hundred fifty-six thousand, two hundred forty".