404766805 has 4 divisors (see below), whose sum is σ = 485720172. Its totient is φ = 323813440.

The previous prime is 404766799. The next prime is 404766809. The reversal of 404766805 is 508667404.

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 220730449 + 184036356 = 14857^2 + 13566^2 .

It is not a de Polignac number, because 404766805 - 2¹⁷ = 404635733 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404766809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40476676 + ... + 40476685.

It is an arithmetic number, because the mean of its divisors is an integer number (121430043).

Almost surely, 2^404766805 is an apocalyptic number.

It is an amenable number.

404766805 is a deficient number, since it is larger than the sum of its proper divisors (80953367).

404766805 is an equidigital number, since it uses as much as digits as its factorization.

404766805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80953366.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 404766805 is about 20118.8171869024. The cubic root of 404766805 is about 739.7215929805.

The spelling of 404766805 in words is "four hundred four million, seven hundred sixty-six thousand, eight hundred five".