4391166 has 32 divisors (see below), whose sum is σ = 9959040. Its totient is φ = 1279584.

The previous prime is 4391161. The next prime is 4391221. The reversal of 4391166 is 6611934.

4391166 is a nontrivial binomial coefficient, being equal to C(2964, 2).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (311220).

Almost surely, 2^4391166 is an apocalyptic number.

4391166 is the 2963-rd triangular number and also the 1482-nd hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4391166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4979520).

4391166 is an abundant number, since it is smaller than the sum of its proper divisors (5567874).

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

4391166 is a wasteful number, since it uses less digits than its factorization.

4391166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000.

The product of its digits is 3888, while the sum is 30.

The square root of 4391166 is about 2095.5109162207. The cubic root of 4391166 is about 163.7545157351.

It can be divided in two parts, 4 and 391166, that added together give a triangular number (391170 = T₈₈₄).

The spelling of 4391166 in words is "four million, three hundred ninety-one thousand, one hundred sixty-six".