252039730 has 8 divisors (see below), whose sum is σ = 453671532. Its totient is φ = 100815888.

The previous prime is 252039707. The next prime is 252039757. The reversal of 252039730 is 37930252.

It can be written as a sum of positive squares in 2 ways, for example, as 241522681 + 10517049 = 15541^2 + 3243^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 252039692 and 252039701.

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, 12601977 + ... + 12601996.

Almost surely, 2^252039730 is an apocalyptic number.

252039730 is a deficient number, since it is larger than the sum of its proper divisors (201631802).

252039730 is a wasteful number, since it uses less digits than its factorization.

252039730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25203980.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 252039730 is about 15875.7591944448. The cubic root of 252039730 is about 631.6691523291.

Adding to 252039730 its reverse (37930252), we get a palindrome (289969982).

The spelling of 252039730 in words is "two hundred fifty-two million, thirty-nine thousand, seven hundred thirty".