804872 has 8 divisors (see below), whose sum is σ = 1509150. Its totient is φ = 402432.

The previous prime is 804857. The next prime is 804877. The reversal of 804872 is 278408.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 155236 = 806^2 + 394^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (804877) by changing a digit.

804872 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50297 + ... + 50312.

2⁸⁰⁴⁸⁷² is an apocalyptic number.

It is an amenable number.

804872 is a deficient number, since it is larger than the sum of its proper divisors (704278).

804872 is a wasteful number, since it uses less digits than its factorization.

804872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100615 (or 100611 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 804872 is about 897.1465877993. The cubic root of 804872 is about 93.0198439175.

The spelling of 804872 in words is "eight hundred four thousand, eight hundred seventy-two".