404590685 has 4 divisors (see below), whose sum is σ = 485508828. Its totient is φ = 323672544.

The previous prime is 404590661. The next prime is 404590699. The reversal of 404590685 is 586095404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143089444 + 261501241 = 11962^2 + 16171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404590685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40459064 + ... + 40459073.

It is an arithmetic number, because the mean of its divisors is an integer number (121377207).

Almost surely, 2^404590685 is an apocalyptic number.

It is an amenable number.

404590685 is a deficient number, since it is larger than the sum of its proper divisors (80918143).

404590685 is an equidigital number, since it uses as much as digits as its factorization.

404590685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80918142.

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

The square root of 404590685 is about 20114.4397137976. The cubic root of 404590685 is about 739.6142894949.

The spelling of 404590685 in words is "four hundred four million, five hundred ninety thousand, six hundred eighty-five".