252840186 has 24 divisors (see below), whose sum is σ = 551502900. Its totient is φ = 83713536.

The previous prime is 252840149. The next prime is 252840187. The reversal of 252840186 is 681048252.

It can be written as a sum of positive squares in 2 ways, for example, as 213715161 + 39125025 = 14619^2 + 6255^2 .

It is a super-3 number, since 3×252840186³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 252840186.

It is not an unprimeable number, because it can be changed into a prime (252840187) 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 11 ways as a sum of consecutive naturals, for example, 44455 + ... + 49818.

Almost surely, 2^252840186 is an apocalyptic number.

252840186 is an abundant number, since it is smaller than the sum of its proper divisors (298662714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252840186 is a wasteful number, since it uses less digits than its factorization.

252840186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94430 (or 94427 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 252840186 is about 15900.9492169493. The cubic root of 252840186 is about 632.3371542002.

The spelling of 252840186 in words is "two hundred fifty-two million, eight hundred forty thousand, one hundred eighty-six".