9800805 has 32 divisors (see below), whose sum is σ = 18505728. Its totient is φ = 4334400.

The previous prime is 9800803. The next prime is 9800821. The reversal of 9800805 is 5080089.

9800805 = T₅₂₆ + T₅₂₇ + ... + T₅₈₈.

9800805 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9800805 - 2¹ = 9800803 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9800801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1750 + ... + 4760.

It is an arithmetic number, because the mean of its divisors is an integer number (578304).

Almost surely, 2^9800805 is an apocalyptic number.

It is an amenable number.

9800805 is a deficient number, since it is larger than the sum of its proper divisors (8704923).

9800805 is a wasteful number, since it uses less digits than its factorization.

9800805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 9800805 is about 3130.6237397682. The cubic root of 9800805 is about 214.0033554078.

The spelling of 9800805 in words is "nine million, eight hundred thousand, eight hundred five".