517609940 has 48 divisors (see below), whose sum is σ = 1139467392. Its totient is φ = 197129856.

The previous prime is 517609889. The next prime is 517609969. The reversal of 517609940 is 49906715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101942 + ... + 106898.

It is an arithmetic number, because the mean of its divisors is an integer number (23738904).

Almost surely, 2^517609940 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 517609940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569733696).

517609940 is an abundant number, since it is smaller than the sum of its proper divisors (621857452).

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

517609940 is a wasteful number, since it uses less digits than its factorization.

517609940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216 (or 5214 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 517609940 is about 22751.0426134716. The cubic root of 517609940 is about 802.9112367747.

The spelling of 517609940 in words is "five hundred seventeen million, six hundred nine thousand, nine hundred forty".