222640330 has 64 divisors (see below), whose sum is σ = 470074752. Its totient is φ = 75018240.

The previous prime is 222640303. The next prime is 222640351. The reversal of 222640330 is 33046222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 31 ways as a sum of consecutive naturals, for example, 124402 + ... + 126178.

It is an arithmetic number, because the mean of its divisors is an integer number (7344918).

Almost surely, 2^222640330 is an apocalyptic number.

222640330 is an abundant number, since it is smaller than the sum of its proper divisors (247434422).

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

222640330 is a wasteful number, since it uses less digits than its factorization.

222640330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 222640330 is about 14921.1370210182. The cubic root of 222640330 is about 606.0865024089.

Adding to 222640330 its reverse (33046222), we get a palindrome (255686552).

The spelling of 222640330 in words is "two hundred twenty-two million, six hundred forty thousand, three hundred thirty".