517776540 has 96 divisors (see below), whose sum is σ = 1483196736. Its totient is φ = 134922240.

The previous prime is 517776521. The next prime is 517776541. The reversal of 517776540 is 45677715.

It is a junction number, because it is equal to n+sod(n) for n = 517776492 and 517776501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517776541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706014 + ... + 706746.

It is an arithmetic number, because the mean of its divisors is an integer number (15449966).

Almost surely, 2^517776540 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 517776540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741598368).

517776540 is an abundant number, since it is smaller than the sum of its proper divisors (965420196).

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

517776540 is a wasteful number, since it uses less digits than its factorization.

517776540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The square root of 517776540 is about 22754.7036895671. The cubic root of 517776540 is about 802.9973702721.

The spelling of 517776540 in words is "five hundred seventeen million, seven hundred seventy-six thousand, five hundred forty".