2185740 has 36 divisors (see below), whose sum is σ = 6630624. Its totient is φ = 582816.

The previous prime is 2185739. The next prime is 2185747. The reversal of 2185740 is 475812.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2185747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5892 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (184184).

2^2185740 is an apocalyptic number.

2185740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185740 is an abundant number, since it is smaller than the sum of its proper divisors (4444884).

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

2185740 is a wasteful number, since it uses less digits than its factorization.

2185740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12158 (or 12153 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2185740 is about 1478.4248374537. The cubic root of 2185740 is about 129.7775287686. Note that the first 3 decimals are identical.

The spelling of 2185740 in words is "two million, one hundred eighty-five thousand, seven hundred forty".