500549985 has 24 divisors (see below), whose sum is σ = 934361064. Its totient is φ = 246424320.

The previous prime is 500549891. The next prime is 500549993. The reversal of 500549985 is 589945005.

500549985 is a `hidden beast` number, since 500 + 54 + 9 + 98 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 121352256 + 379197729 = 11016^2 + 19473^2 .

It is not a de Polignac number, because 500549985 - 2⁷ = 500549857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 500549985.

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, 427236 + ... + 428405.

It is an arithmetic number, because the mean of its divisors is an integer number (38931711).

Almost surely, 2^500549985 is an apocalyptic number.

It is an amenable number.

500549985 is a deficient number, since it is larger than the sum of its proper divisors (433811079).

500549985 is a wasteful number, since it uses less digits than its factorization.

500549985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855665 (or 855662 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 500549985 is about 22372.9744334543. The cubic root of 500549985 is about 793.9914349356.

The spelling of 500549985 in words is "five hundred million, five hundred forty-nine thousand, nine hundred eighty-five".