2165976 has 48 divisors (see below), whose sum is σ = 5967000. Its totient is φ = 709632.

The previous prime is 2165971. The next prime is 2166007. The reversal of 2165976 is 6795612.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2165976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4600 + ... + 5048.

2^2165976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2165976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2983500).

2165976 is an abundant number, since it is smaller than the sum of its proper divisors (3801024).

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

2165976 is a wasteful number, since it uses less digits than its factorization.

2165976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 521 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 2165976 is about 1471.7255178871. The cubic root of 2165976 is about 129.3851836834.

Subtracting from 2165976 its product of digits (22680), we obtain a square (2143296 = 1464²).

The spelling of 2165976 in words is "two million, one hundred sixty-five thousand, nine hundred seventy-six".