222423720 has 64 divisors (see below), whose sum is σ = 670127040. Its totient is φ = 59059200.

The previous prime is 222423713. The next prime is 222423739. The reversal of 222423720 is 27324222.

It is a happy number.

It is a super-2 number, since 2×222423720² = 98944622437276800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 25075 + ... + 32765.

It is an arithmetic number, because the mean of its divisors is an integer number (10470735).

Almost surely, 2^222423720 is an apocalyptic number.

222423720 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 222423720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335063520).

222423720 is an abundant number, since it is smaller than the sum of its proper divisors (447703320).

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

222423720 is a wasteful number, since it uses less digits than its factorization.

222423720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946 (or 7942 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 222423720 is about 14913.8767595820. The cubic root of 222423720 is about 605.8898818528.

Adding to 222423720 its reverse (27324222), we get a palindrome (249747942).

The spelling of 222423720 in words is "two hundred twenty-two million, four hundred twenty-three thousand, seven hundred twenty".