998822785 has 16 divisors (see below), whose sum is σ = 1242383040. Its totient is φ = 769970880.

The previous prime is 998822767. The next prime is 998822831. The reversal of 998822785 is 587228899.

It is not a de Polignac number, because 998822785 - 2⁹ = 998822273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69250 + ... + 82420.

It is an arithmetic number, because the mean of its divisors is an integer number (77648940).

Almost surely, 2^998822785 is an apocalyptic number.

It is an amenable number.

998822785 is a deficient number, since it is larger than the sum of its proper divisors (243560255).

998822785 is a wasteful number, since it uses less digits than its factorization.

998822785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13728.

The product of its digits is 5806080, while the sum is 58.

The square root of 998822785 is about 31604.1577169840. The cubic root of 998822785 is about 999.6074409175.

The spelling of 998822785 in words is "nine hundred ninety-eight million, eight hundred twenty-two thousand, seven hundred eighty-five".