222889380 has 384 divisors, whose sum is σ = 836075520. Its totient is φ = 43130880.

The previous prime is 222889379. The next prime is 222889391. The reversal of 222889380 is 83988222.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4205434 + ... + 4205486.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^222889380 is an apocalyptic number.

222889380 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 222889380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418037760).

222889380 is an abundant number, since it is smaller than the sum of its proper divisors (613186140).

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

222889380 is a wasteful number, since it uses less digits than its factorization.

222889380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 222889380 is about 14929.4802320777. The cubic root of 222889380 is about 606.3124117558.

The spelling of 222889380 in words is "two hundred twenty-two million, eight hundred eighty-nine thousand, three hundred eighty".