509476986 has 64 divisors (see below), whose sum is σ = 1163859840. Its totient is φ = 165110400.

The previous prime is 509476949. The next prime is 509476999. The reversal of 509476986 is 689674905.

509476986 is a `hidden beast` number, since 509 + 47 + 6 + 98 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 726436 + ... + 727136.

It is an arithmetic number, because the mean of its divisors is an integer number (18185310).

Almost surely, 2^509476986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 509476986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581929920).

509476986 is an abundant number, since it is smaller than the sum of its proper divisors (654382854).

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

509476986 is a wasteful number, since it uses less digits than its factorization.

509476986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 509476986 is about 22571.5968863525. The cubic root of 509476986 is about 798.6837658054.

The spelling of 509476986 in words is "five hundred nine million, four hundred seventy-six thousand, nine hundred eighty-six".