517678812 has 72 divisors (see below), whose sum is σ = 1506377600. Its totient is φ = 146834208.

The previous prime is 517678801. The next prime is 517678829. The reversal of 517678812 is 218876715.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27639 + ... + 42417.

Almost surely, 2^517678812 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 517678812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753188800).

517678812 is an abundant number, since it is smaller than the sum of its proper divisors (988698788).

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

517678812 is a wasteful number, since it uses less digits than its factorization.

517678812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14935 (or 14930 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 517678812 is about 22752.5561640885. The cubic root of 517678812 is about 802.9468463757.

The spelling of 517678812 in words is "five hundred seventeen million, six hundred seventy-eight thousand, eight hundred twelve".