801986 has 8 divisors (see below), whose sum is σ = 1208844. Its totient is φ = 399040.

The previous prime is 801973. The next prime is 801989. The reversal of 801986 is 689108.

It can be written as a sum of positive squares in 2 ways, for example, as 801025 + 961 = 895^2 + 31^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (801989) by changing a digit.

801986 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 in 3 ways as a sum of consecutive naturals, for example, 395 + ... + 1326.

2⁸⁰¹⁹⁸⁶ is an apocalyptic number.

801986 is a deficient number, since it is larger than the sum of its proper divisors (406858).

801986 is a wasteful number, since it uses less digits than its factorization.

801986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 801986 is about 895.5367105820. The cubic root of 801986 is about 92.9085314878.

The spelling of 801986 in words is "eight hundred one thousand, nine hundred eighty-six".