801806 has 4 divisors (see below), whose sum is σ = 1202712. Its totient is φ = 400902.

The previous prime is 801791. The next prime is 801809. The reversal of 801806 is 608108.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801809) by changing a digit.

801806 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200450 + ... + 200453.

It is an arithmetic number, because the mean of its divisors is an integer number (300678).

2⁸⁰¹⁸⁰⁶ is an apocalyptic number.

801806 is a deficient number, since it is larger than the sum of its proper divisors (400906).

801806 is a wasteful number, since it uses less digits than its factorization.

801806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400905.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 801806 is about 895.4362065496. The cubic root of 801806 is about 92.9015800835.

The spelling of 801806 in words is "eight hundred one thousand, eight hundred six".