252187998 has 8 divisors (see below), whose sum is σ = 504376008. Its totient is φ = 84062664.

The previous prime is 252187963. The next prime is 252188003. The reversal of 252187998 is 899781252.

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

252187998 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 252187998.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21015661 + ... + 21015672.

It is an arithmetic number, because the mean of its divisors is an integer number (63047001).

Almost surely, 2^252187998 is an apocalyptic number.

252187998 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.

252187998 is a wasteful number, since it uses less digits than its factorization.

252187998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42031338.

The product of its digits is 725760, while the sum is 51.

The square root of 252187998 is about 15880.4281428430. The cubic root of 252187998 is about 631.7929925437.

The spelling of 252187998 in words is "two hundred fifty-two million, one hundred eighty-seven thousand, nine hundred ninety-eight".