252297918 has 48 divisors (see below), whose sum is σ = 580447296. Its totient is φ = 78927360.

The previous prime is 252297889. The next prime is 252297923. The reversal of 252297918 is 819792252.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130930 + ... + 132842.

It is an arithmetic number, because the mean of its divisors is an integer number (12092652).

Almost surely, 2^252297918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252297918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290223648).

252297918 is an abundant number, since it is smaller than the sum of its proper divisors (328149378).

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

252297918 is a wasteful number, since it uses less digits than its factorization.

252297918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369 (or 2366 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 252297918 is about 15883.8886296776. Note that the first 3 decimals coincide. The cubic root of 252297918 is about 631.8847714268.

The spelling of 252297918 in words is "two hundred fifty-two million, two hundred ninety-seven thousand, nine hundred eighteen".