2209724 has 12 divisors (see below), whose sum is σ = 4218648. Its totient is φ = 1004400.

The previous prime is 2209721. The next prime is 2209741. The reversal of 2209724 is 4279022.

2209724 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2209693 and 2209702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25067 + ... + 25154.

It is an arithmetic number, because the mean of its divisors is an integer number (351554).

2^2209724 is an apocalyptic number.

It is an amenable number.

2209724 is a deficient number, since it is larger than the sum of its proper divisors (2008924).

2209724 is a wasteful number, since it uses less digits than its factorization.

2209724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50236 (or 50234 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 2209724 is about 1486.5140429878. The cubic root of 2209724 is about 130.2504835287.

The spelling of 2209724 in words is "two million, two hundred nine thousand, seven hundred twenty-four".