517382840 has 64 divisors (see below), whose sum is σ = 1287588960. Its totient is φ = 185863680.

The previous prime is 517382821. The next prime is 517382843. The reversal of 517382840 is 48283715.

It is a junction number, because it is equal to n+sod(n) for n = 517382794 and 517382803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517382843) 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, 5795 + ... + 32685.

Almost surely, 2^517382840 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 517382840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643794480).

517382840 is an abundant number, since it is smaller than the sum of its proper divisors (770206120).

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

517382840 is a wasteful number, since it uses less digits than its factorization.

517382840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26952 (or 26948 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 517382840 is about 22746.0510858478. The cubic root of 517382840 is about 802.7937945327.

The spelling of 517382840 in words is "five hundred seventeen million, three hundred eighty-two thousand, eight hundred forty".