2168220 has 24 divisors (see below), whose sum is σ = 6071184. Its totient is φ = 578176.

The previous prime is 2168219. The next prime is 2168239. The reversal of 2168220 is 228612.

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, 18009 + ... + 18128.

It is an arithmetic number, because the mean of its divisors is an integer number (252966).

2^2168220 is an apocalyptic number.

2168220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2168220 is an abundant number, since it is smaller than the sum of its proper divisors (3902964).

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

2168220 is a wasteful number, since it uses less digits than its factorization.

2168220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36149 (or 36147 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2168220 is about 1472.4876909503. The cubic root of 2168220 is about 129.4298502515.

The spelling of 2168220 in words is "two million, one hundred sixty-eight thousand, two hundred twenty".