2166988 has 12 divisors (see below), whose sum is σ = 3991960. Its totient is φ = 1026432.

The previous prime is 2166977. The next prime is 2167003. The reversal of 2166988 is 8896612.

It is a self number, because there is not a number n which added to its sum of digits gives 2166988.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14181 + ... + 14332.

2^2166988 is an apocalyptic number.

It is an amenable number.

2166988 is a deficient number, since it is larger than the sum of its proper divisors (1824972).

2166988 is a wasteful number, since it uses less digits than its factorization.

2166988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28536 (or 28534 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 2166988 is about 1472.0692918474. The cubic root of 2166988 is about 129.4053312472.

The spelling of 2166988 in words is "two million, one hundred sixty-six thousand, nine hundred eighty-eight".