2168840242 has 8 divisors (see below), whose sum is σ = 3314642796. Its totient is φ = 1063959312.

The previous prime is 2168840237. The next prime is 2168840249. The reversal of 2168840242 is 2420488612.

It can be written as a sum of positive squares in 2 ways, for example, as 1715533561 + 453306681 = 41419^2 + 21291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2168840249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10230273 + ... + 10230484.

Almost surely, 2^2168840242 is an apocalyptic number.

2168840242 is a deficient number, since it is larger than the sum of its proper divisors (1145802554).

2168840242 is a wasteful number, since it uses less digits than its factorization.

2168840242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20460812.

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 2168840242 is about 46570.8089042911. The cubic root of 2168840242 is about 1294.4219066218.

The spelling of 2168840242 in words is "two billion, one hundred sixty-eight million, eight hundred forty thousand, two hundred forty-two".