509494664 has 32 divisors (see below), whose sum is σ = 1115009280. Its totient is φ = 213707904.

The previous prime is 509494637. The next prime is 509494669. The reversal of 509494664 is 466494905.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (509494669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94157 + ... + 99420.

It is an arithmetic number, because the mean of its divisors is an integer number (34844040).

Almost surely, 2^509494664 is an apocalyptic number.

It is an amenable number.

509494664 is an abundant number, since it is smaller than the sum of its proper divisors (605514616).

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

509494664 is a wasteful number, since it uses less digits than its factorization.

509494664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193637 (or 193633 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 509494664 is about 22571.9884813013. The cubic root of 509494664 is about 798.6930033626.

The spelling of 509494664 in words is "five hundred nine million, four hundred ninety-four thousand, six hundred sixty-four".