222320628 has 36 divisors (see below), whose sum is σ = 595036260. Its totient is φ = 69747456.

The previous prime is 222320627. The next prime is 222320629. The reversal of 222320628 is 826023222.

It is a happy number.

222320628 is a `hidden beast` number, since 2 + 2 + 2 + 32 + 0 + 628 = 666.

222320628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (222320627) and next prime (222320629).

It can be written as a sum of positive squares in 2 ways, for example, as 120956004 + 101364624 = 10998^2 + 10068^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222320627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181023 + ... + 182246.

It is an arithmetic number, because the mean of its divisors is an integer number (16528785).

Almost surely, 2^222320628 is an apocalyptic number.

It is an amenable number.

222320628 is an abundant number, since it is smaller than the sum of its proper divisors (372715632).

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

222320628 is a wasteful number, since it uses less digits than its factorization.

222320628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363296 (or 363291 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 222320628 is about 14910.4201148056. The cubic root of 222320628 is about 605.7962586659.

The spelling of 222320628 in words is "two hundred twenty-two million, three hundred twenty thousand, six hundred twenty-eight".