2165628 has 24 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 718000.

The previous prime is 2165617. The next prime is 2165651. The reversal of 2165628 is 8265612.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2165595 and 2165604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2653 + ... + 3371.

It is an arithmetic number, because the mean of its divisors is an integer number (211680).

2^2165628 is an apocalyptic number.

It is an amenable number.

2165628 is an abundant number, since it is smaller than the sum of its proper divisors (2914692).

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

2165628 is a wasteful number, since it uses less digits than its factorization.

2165628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 975 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 2165628 is about 1471.6072845702. The cubic root of 2165628 is about 129.3782540198.

The spelling of 2165628 in words is "two million, one hundred sixty-five thousand, six hundred twenty-eight".