501540072 has 64 divisors (see below), whose sum is σ = 1411983360. Its totient is φ = 147076800.

The previous prime is 501540023. The next prime is 501540073. The reversal of 501540072 is 270045105.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (501540073) 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, 22458 + ... + 38825.

It is an arithmetic number, because the mean of its divisors is an integer number (22062240).

Almost surely, 2^501540072 is an apocalyptic number.

It is an amenable number.

501540072 is an abundant number, since it is smaller than the sum of its proper divisors (910443288).

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

501540072 is a wasteful number, since it uses less digits than its factorization.

501540072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61334 (or 61330 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 501540072 is about 22395.0903548077. The cubic root of 501540072 is about 794.5145947100.

Adding to 501540072 its reverse (270045105), we get a palindrome (771585177).

The spelling of 501540072 in words is "five hundred one million, five hundred forty thousand, seventy-two".