409511985 has 16 divisors (see below), whose sum is σ = 657320064. Its totient is φ = 217706112.

The previous prime is 409511983. The next prime is 409511989. The reversal of 409511985 is 589115904.

It is not a de Polignac number, because 409511985 - 2¹ = 409511983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409511983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38917 + ... + 48306.

It is an arithmetic number, because the mean of its divisors is an integer number (41082504).

Almost surely, 2^409511985 is an apocalyptic number.

It is an amenable number.

409511985 is a deficient number, since it is larger than the sum of its proper divisors (247808079).

409511985 is a wasteful number, since it uses less digits than its factorization.

409511985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87544.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 409511985 is about 20236.4024717834. The cubic root of 409511985 is about 742.6010156298.

The spelling of 409511985 in words is "four hundred nine million, five hundred eleven thousand, nine hundred eighty-five".