168840236 has 6 divisors (see below), whose sum is σ = 295470420. Its totient is φ = 84420116.

The previous prime is 168840227. The next prime is 168840247. The reversal of 168840236 is 632048861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 168840236.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21105026 + ... + 21105033.

It is an arithmetic number, because the mean of its divisors is an integer number (49245070).

Almost surely, 2^168840236 is an apocalyptic number.

It is an amenable number.

168840236 is a deficient number, since it is larger than the sum of its proper divisors (126630184).

168840236 is a wasteful number, since it uses less digits than its factorization.

168840236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42210063 (or 42210061 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 168840236 is about 12993.8537778444. The cubic root of 168840236 is about 552.7032056938.

The spelling of 168840236 in words is "one hundred sixty-eight million, eight hundred forty thousand, two hundred thirty-six".