805898 has 4 divisors (see below), whose sum is σ = 1208850. Its totient is φ = 402948.

The previous prime is 805891. The next prime is 805901. The reversal of 805898 is 898508.

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

It can be written as a sum of positive squares in only one way, i.e., 582169 + 223729 = 763^2 + 473^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805898.

It is not an unprimeable number, because it can be changed into a prime (805891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201473 + ... + 201476.

2⁸⁰⁵⁸⁹⁸ is an apocalyptic number.

805898 is a deficient number, since it is larger than the sum of its proper divisors (402952).

805898 is a wasteful number, since it uses less digits than its factorization.

805898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402951.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 805898 is about 897.7182185965. The cubic root of 805898 is about 93.0593524090.

The spelling of 805898 in words is "eight hundred five thousand, eight hundred ninety-eight".