2009730 has 32 divisors (see below), whose sum is σ = 4981248. Its totient is φ = 518400.

The previous prime is 2009719. The next prime is 2009731. The reversal of 2009730 is 379002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2009697 and 2009706.

It is not an unprimeable number, because it can be changed into a prime (2009731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151 + ... + 2010.

It is an arithmetic number, because the mean of its divisors is an integer number (155664).

2^2009730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2009730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2490624).

2009730 is an abundant number, since it is smaller than the sum of its proper divisors (2971518).

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

2009730 is a wasteful number, since it uses less digits than its factorization.

2009730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 2009730 is about 1417.6494630197. The cubic root of 2009730 is about 126.1960917447.

The spelling of 2009730 in words is "two million, nine thousand, seven hundred thirty".