517128540 has 24 divisors (see below), whose sum is σ = 1447960080. Its totient is φ = 137900928.

The previous prime is 517128533. The next prime is 517128541. The reversal of 517128540 is 45821715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517128541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4309345 + ... + 4309464.

It is an arithmetic number, because the mean of its divisors is an integer number (60331670).

Almost surely, 2^517128540 is an apocalyptic number.

It is an amenable number.

517128540 is an abundant number, since it is smaller than the sum of its proper divisors (930831540).

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

517128540 is a wasteful number, since it uses less digits than its factorization.

517128540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618821 (or 8618819 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 517128540 is about 22740.4604175025. The cubic root of 517128540 is about 802.6622453182.

The spelling of 517128540 in words is "five hundred seventeen million, one hundred twenty-eight thousand, five hundred forty".