501243240 has 64 divisors (see below), whose sum is σ = 1510436160. Its totient is φ = 133068800.

The previous prime is 501243233. The next prime is 501243241. The reversal of 501243240 is 42342105.

It is not an unprimeable number, because it can be changed into a prime (501243241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18040 + ... + 36440.

It is an arithmetic number, because the mean of its divisors is an integer number (23600565).

Almost surely, 2^501243240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501243240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755218080).

501243240 is an abundant number, since it is smaller than the sum of its proper divisors (1009192920).

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

501243240 is a wasteful number, since it uses less digits than its factorization.

501243240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18642 (or 18638 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 501243240 is about 22388.4622071280. The cubic root of 501243240 is about 794.3578216618.

Adding to 501243240 its reverse (42342105), we get a palindrome (543585345).

The spelling of 501243240 in words is "five hundred one million, two hundred forty-three thousand, two hundred forty".