2118720 has 56 divisors (see below), whose sum is σ = 6729984. Its totient is φ = 564736.

The previous prime is 2118703. The next prime is 2118733. The reversal of 2118720 is 278112.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144 + ... + 2063.

2^2118720 is an apocalyptic number.

2118720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3364992).

2118720 is an abundant number, since it is smaller than the sum of its proper divisors (4611264).

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

2118720 is a wasteful number, since it uses less digits than its factorization.

2118720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 2118720 is about 1455.5823576837. The cubic root of 2118720 is about 128.4373063441.

The spelling of 2118720 in words is "two million, one hundred eighteen thousand, seven hundred twenty".