404137985 has 8 divisors (see below), whose sum is σ = 494116200. Its totient is φ = 317209984.

The previous prime is 404137973. The next prime is 404138017. The reversal of 404137985 is 589731404.

It can be written as a sum of positive squares in 4 ways, for example, as 191794801 + 212343184 = 13849^2 + 14572^2 .

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 404137985 - 2⁸ = 404137729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762260 + ... + 762789.

It is an arithmetic number, because the mean of its divisors is an integer number (61764525).

Almost surely, 2^404137985 is an apocalyptic number.

It is an amenable number.

404137985 is a deficient number, since it is larger than the sum of its proper divisors (89978215).

404137985 is a wasteful number, since it uses less digits than its factorization.

404137985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525107.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 404137985 is about 20103.1834543686. The cubic root of 404137985 is about 739.3383329476.

The spelling of 404137985 in words is "four hundred four million, one hundred thirty-seven thousand, nine hundred eighty-five".