406000405985 has 8 divisors (see below), whose sum is σ = 487286160360. Its totient is φ = 324743209344.

The previous prime is 406000405969. The next prime is 406000406107. The reversal of 406000405985 is 589504000604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 141170778529 + 264829627456 = 375727^2 + 514616^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406000405985 - 2⁴ = 406000405969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7108142 + ... + 7165031.

It is an arithmetic number, because the mean of its divisors is an integer number (60910770045).

Almost surely, 2^406000405985 is an apocalyptic number.

It is an amenable number.

406000405985 is a deficient number, since it is larger than the sum of its proper divisors (81285754375).

406000405985 is a wasteful number, since it uses less digits than its factorization.

406000405985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278867.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 406000405985 in words is "four hundred six billion, four hundred five thousand, nine hundred eighty-five".