2209724842 has 16 divisors (see below), whose sum is σ = 3582453672. Its totient is φ = 1016187840.

The previous prime is 2209724827. The next prime is 2209724851. The reversal of 2209724842 is 2484279022.

It can be written as a sum of positive squares in 4 ways, for example, as 1360060641 + 849664201 = 36879^2 + 29149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2209724795 and 2209724804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146209 + ... + 160612.

Almost surely, 2^2209724842 is an apocalyptic number.

2209724842 is a deficient number, since it is larger than the sum of its proper divisors (1372728830).

2209724842 is a wasteful number, since it uses less digits than its factorization.

2209724842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307113.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 2209724842 is about 47007.7104526481. The cubic root of 2209724842 is about 1302.5050007237.

The spelling of 2209724842 in words is "two billion, two hundred nine million, seven hundred twenty-four thousand, eight hundred forty-two".