805986 has 12 divisors (see below), whose sum is σ = 1746342. Its totient is φ = 268656.

The previous prime is 805967. The next prime is 805991. The reversal of 805986 is 689508.

It can be written as a sum of positive squares in only one way, i.e., 463761 + 342225 = 681^2 + 585^2 .

It is a super-2 number, since 2×805986² = 1299226864392, 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 805986.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22371 + ... + 22406.

2⁸⁰⁵⁹⁸⁶ is an apocalyptic number.

805986 is an abundant number, since it is smaller than the sum of its proper divisors (940356).

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

805986 is a wasteful number, since it uses less digits than its factorization.

805986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44785 (or 44782 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 805986 is about 897.7672304111. The cubic root of 805986 is about 93.0627394898.

The spelling of 805986 in words is "eight hundred five thousand, nine hundred eighty-six".