2160740 has 12 divisors (see below), whose sum is σ = 4537596. Its totient is φ = 864288.

The previous prime is 2160733. The next prime is 2160749. The reversal of 2160740 is 470612.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 1653796 = 712^2 + 1286^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 108037 = 2160740 / (2 + 1 + 6 + 0 + 7 + 4 + 0).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2160749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53999 + ... + 54038.

It is an arithmetic number, because the mean of its divisors is an integer number (378133).

2^2160740 is an apocalyptic number.

2160740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2160740 is an abundant number, since it is smaller than the sum of its proper divisors (2376856).

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

2160740 is a wasteful number, since it uses less digits than its factorization.

2160740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108046 (or 108044 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 2160740 is about 1469.9455772239. The cubic root of 2160740 is about 129.2808415838.

The spelling of 2160740 in words is "two million, one hundred sixty thousand, seven hundred forty".