252286638 has 8 divisors (see below), whose sum is σ = 504573288. Its totient is φ = 84095544.

The previous prime is 252286607. The next prime is 252286663. The reversal of 252286638 is 836682252.

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

252286638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 252286638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21023881 + ... + 21023892.

It is an arithmetic number, because the mean of its divisors is an integer number (63071661).

Almost surely, 2^252286638 is an apocalyptic number.

252286638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

252286638 is a wasteful number, since it uses less digits than its factorization.

252286638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42047778.

The product of its digits is 276480, while the sum is 42.

The square root of 252286638 is about 15883.5335489305. The cubic root of 252286638 is about 631.8753542974.

The spelling of 252286638 in words is "two hundred fifty-two million, two hundred eighty-six thousand, six hundred thirty-eight".