252168290 has 16 divisors (see below), whose sum is σ = 495167040. Its totient is φ = 91697520.

The previous prime is 252168289. The next prime is 252168299. The reversal of 252168290 is 92861252.

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 252168290.

It is not an unprimeable number, because it can be changed into a prime (252168299) 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 7 ways as a sum of consecutive naturals, for example, 1146110 + ... + 1146329.

It is an arithmetic number, because the mean of its divisors is an integer number (30947940).

Almost surely, 2^252168290 is an apocalyptic number.

252168290 is a deficient number, since it is larger than the sum of its proper divisors (242998750).

252168290 is a wasteful number, since it uses less digits than its factorization.

252168290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292457.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 252168290 is about 15879.8076184820. The cubic root of 252168290 is about 631.7765343184.

The spelling of 252168290 in words is "two hundred fifty-two million, one hundred sixty-eight thousand, two hundred ninety".