501391272 has 64 divisors (see below), whose sum is σ = 1302773760. Its totient is φ = 160632000.

The previous prime is 501391259. The next prime is 501391273. The reversal of 501391272 is 272193105.

It is not an unprimeable number, because it can be changed into a prime (501391273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110113 + ... + 114575.

It is an arithmetic number, because the mean of its divisors is an integer number (20355840).

Almost surely, 2^501391272 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 501391272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651386880).

501391272 is an abundant number, since it is smaller than the sum of its proper divisors (801382488).

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

501391272 is a wasteful number, since it uses less digits than its factorization.

501391272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654 (or 4650 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 501391272 is about 22391.7679516379. The cubic root of 501391272 is about 794.4360131090.

The spelling of 501391272 in words is "five hundred one million, three hundred ninety-one thousand, two hundred seventy-two".