2165380 has 24 divisors (see below), whose sum is σ = 5197248. Its totient is φ = 742368.

The previous prime is 2165357. The next prime is 2165393. The reversal of 2165380 is 835612.

It is a happy 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, 7594 + ... + 7873.

It is an arithmetic number, because the mean of its divisors is an integer number (216552).

2^2165380 is an apocalyptic number.

2165380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165380 is an abundant number, since it is smaller than the sum of its proper divisors (3031868).

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

2165380 is a wasteful number, since it uses less digits than its factorization.

2165380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15483 (or 15481 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2165380 is about 1471.5230205471. The cubic root of 2165380 is about 129.3733151857.

The spelling of 2165380 in words is "two million, one hundred sixty-five thousand, three hundred eighty".