2160640 has 48 divisors (see below), whose sum is σ = 5208840. Its totient is φ = 860160.

The previous prime is 2160629. The next prime is 2160671. The reversal of 2160640 is 460612.

2160640 = T₂₄ + T₂₅ + ... + T₂₃₄.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10135 + ... + 10345.

2^2160640 is an apocalyptic number.

2160640 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 2160640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2604420).

2160640 is an abundant number, since it is smaller than the sum of its proper divisors (3048200).

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

2160640 is an equidigital number, since it uses as much as digits as its factorization.

2160640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2160640 is about 1469.9115619655. The cubic root of 2160640 is about 129.2788471616.

The spelling of 2160640 in words is "two million, one hundred sixty thousand, six hundred forty".