500917986 has 64 divisors (see below), whose sum is σ = 1166400000. Its totient is φ = 159134976.

The previous prime is 500917961. The next prime is 500918017. The reversal of 500917986 is 689719005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121690 + ... + 125738.

It is an arithmetic number, because the mean of its divisors is an integer number (18225000).

Almost surely, 2^500917986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 500917986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583200000).

500917986 is an abundant number, since it is smaller than the sum of its proper divisors (665482014).

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

500917986 is a wasteful number, since it uses less digits than its factorization.

500917986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4162 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 500917986 is about 22381.1971529675. The cubic root of 500917986 is about 794.1859663343.

The spelling of 500917986 in words is "five hundred million, nine hundred seventeen thousand, nine hundred eighty-six".