404409985 has 24 divisors (see below), whose sum is σ = 567271296. Its totient is φ = 275960160.

The previous prime is 404409983. The next prime is 404410007. The reversal of 404409985 is 589904404.

It is not a de Polignac number, because 404409985 - 2¹ = 404409983 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404409983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47784 + ... + 55606.

It is an arithmetic number, because the mean of its divisors is an integer number (23636304).

Almost surely, 2^404409985 is an apocalyptic number.

It is an amenable number.

404409985 is a deficient number, since it is larger than the sum of its proper divisors (162861311).

404409985 is a wasteful number, since it uses less digits than its factorization.

404409985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053 (or 8046 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 404409985 is about 20109.9474141530. The cubic root of 404409985 is about 739.5041632127.

The spelling of 404409985 in words is "four hundred four million, four hundred nine thousand, nine hundred eighty-five".