222188346 has 80 divisors (see below), whose sum is σ = 519095808. Its totient is φ = 70956000.

The previous prime is 222188339. The next prime is 222188347. The reversal of 222188346 is 643881222.

It is a super-2 number, since 2×222188346² = 98735322196431432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222188346.

It is not an unprimeable number, because it can be changed into a prime (222188347) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 758176 + ... + 758468.

Almost surely, 2^222188346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222188346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259547904).

222188346 is an abundant number, since it is smaller than the sum of its proper divisors (296907462).

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

222188346 is a wasteful number, since it uses less digits than its factorization.

222188346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 480 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 222188346 is about 14905.9835636566. The cubic root of 222188346 is about 605.6760841228.

The spelling of 222188346 in words is "two hundred twenty-two million, one hundred eighty-eight thousand, three hundred forty-six".