804172005 has 48 divisors (see below), whose sum is σ = 1715575680. Its totient is φ = 339341184.

The previous prime is 804171997. The next prime is 804172007. The reversal of 804172005 is 500271408.

It is not a de Polignac number, because 804172005 - 2³ = 804171997 is a prime.

It is a super-2 number, since 2×804172005² = 1293385227251440050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 804172005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804172007) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 94095 + ... + 102284.

It is an arithmetic number, because the mean of its divisors is an integer number (35741160).

Almost surely, 2^804172005 is an apocalyptic number.

It is an amenable number.

804172005 is an abundant number, since it is smaller than the sum of its proper divisors (911403675).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

804172005 is a wasteful number, since it uses less digits than its factorization.

804172005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196410 (or 196407 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 804172005 is about 28357.9266696280. The cubic root of 804172005 is about 929.9286972736.

The spelling of 804172005 in words is "eight hundred four million, one hundred seventy-two thousand, five".