2166288 has 20 divisors (see below), whose sum is σ = 5596368. Its totient is φ = 722080.

The previous prime is 2166251. The next prime is 2166289. The reversal of 2166288 is 8826612.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2166289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22518 + ... + 22613.

2^2166288 is an apocalyptic number.

It is an amenable number.

2166288 is an abundant number, since it is smaller than the sum of its proper divisors (3430080).

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

2166288 is a wasteful number, since it uses less digits than its factorization.

2166288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45142 (or 45136 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 2166288 is about 1471.8315120964. The cubic root of 2166288 is about 129.3913958543.

Adding to 2166288 its sum of digits (33), we get a triangular number (2166321 = T₂₀₈₁).

The spelling of 2166288 in words is "two million, one hundred sixty-six thousand, two hundred eighty-eight".