1866885222 has 16 divisors (see below), whose sum is σ = 3735745200. Its totient is φ = 621965952.

The previous prime is 1866885221. The next prime is 1866885263. The reversal of 1866885222 is 2225886681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866885221) 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, 69847 + ... + 92802.

It is an arithmetic number, because the mean of its divisors is an integer number (233484075).

Almost surely, 2^1866885222 is an apocalyptic number.

1866885222 is an abundant number, since it is smaller than the sum of its proper divisors (1868859978).

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

1866885222 is a wasteful number, since it uses less digits than its factorization.

1866885222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164567.

The product of its digits is 737280, while the sum is 48.

The square root of 1866885222 is about 43207.4672018622. The cubic root of 1866885222 is about 1231.3245523600.

The spelling of 1866885222 in words is "one billion, eight hundred sixty-six million, eight hundred eighty-five thousand, two hundred twenty-two".