222028240 has 40 divisors (see below), whose sum is σ = 589962240. Its totient is φ = 76123776.

The previous prime is 222028229. The next prime is 222028241. The reversal of 222028240 is 42820222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222028241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197680 + ... + 198799.

It is an arithmetic number, because the mean of its divisors is an integer number (14749056).

Almost surely, 2^222028240 is an apocalyptic number.

222028240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222028240 is an abundant number, since it is smaller than the sum of its proper divisors (367934000).

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

222028240 is a wasteful number, since it uses less digits than its factorization.

222028240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396499 (or 396493 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 222028240 is about 14900.6120679655. The cubic root of 222028240 is about 605.5305684247.

Adding to 222028240 its reverse (42820222), we get a palindrome (264848462).

The spelling of 222028240 in words is "two hundred twenty-two million, twenty-eight thousand, two hundred forty".