2221988 has 12 divisors (see below), whose sum is σ = 3946992. Its totient is φ = 1094280.

The previous prime is 2221981. The next prime is 2221991. The reversal of 2221988 is 8891222.

2221988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2221981) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3878 + ... + 4413.

It is an arithmetic number, because the mean of its divisors is an integer number (328916).

2^2221988 is an apocalyptic number.

It is an amenable number.

2221988 is a deficient number, since it is larger than the sum of its proper divisors (1725004).

2221988 is a wasteful number, since it uses less digits than its factorization.

2221988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8362 (or 8360 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 2221988 is about 1490.6334224081. The cubic root of 2221988 is about 130.4910031329.

The spelling of 2221988 in words is "two million, two hundred twenty-one thousand, nine hundred eighty-eight".