998810705 has 32 divisors (see below), whose sum is σ = 1252091520. Its totient is φ = 764375040.

The previous prime is 998810689. The next prime is 998810723. The reversal of 998810705 is 507018899.

It is a happy number.

It is not a de Polignac number, because 998810705 - 2⁴ = 998810689 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 998810705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3017390 + ... + 3017720.

It is an arithmetic number, because the mean of its divisors is an integer number (39127860).

Almost surely, 2^998810705 is an apocalyptic number.

It is an amenable number.

998810705 is a deficient number, since it is larger than the sum of its proper divisors (253280815).

998810705 is a wasteful number, since it uses less digits than its factorization.

998810705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 998810705 is about 31603.9666023112. The cubic root of 998810705 is about 999.6034110713.

The spelling of 998810705 in words is "nine hundred ninety-eight million, eight hundred ten thousand, seven hundred five".