2166380 has 24 divisors (see below), whose sum is σ = 4789680. Its totient is φ = 820800.

The previous prime is 2166319. The next prime is 2166403. The reversal of 2166380 is 836612.

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, 2471 + ... + 3230.

It is an arithmetic number, because the mean of its divisors is an integer number (199570).

2^2166380 is an apocalyptic number.

2166380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166380 is an abundant number, since it is smaller than the sum of its proper divisors (2623300).

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

2166380 is a wasteful number, since it uses less digits than its factorization.

2166380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5729 (or 5727 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2166380 is about 1471.8627653419. The cubic root of 2166380 is about 129.3932275344.

The spelling of 2166380 in words is "two million, one hundred sixty-six thousand, three hundred eighty".