223021440 has 192 divisors, whose sum is σ = 795600000. Its totient is φ = 57507840.

The previous prime is 223021417. The next prime is 223021457. The reversal of 223021440 is 44120322.

223021440 is a `hidden beast` number, since 223 + 0 + 2 + 1 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177936 + ... + 179184.

It is an arithmetic number, because the mean of its divisors is an integer number (4143750).

Almost surely, 2^223021440 is an apocalyptic number.

223021440 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 223021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397800000).

223021440 is an abundant number, since it is smaller than the sum of its proper divisors (572578560).

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

223021440 is a wasteful number, since it uses less digits than its factorization.

223021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 223021440 is about 14933.9023701108. The cubic root of 223021440 is about 606.4321330406.

Adding to 223021440 its reverse (44120322), we get a palindrome (267141762).

The spelling of 223021440 in words is "two hundred twenty-three million, twenty-one thousand, four hundred forty".