998825684 has 24 divisors (see below), whose sum is σ = 1869857640. Its totient is φ = 465186816.

The previous prime is 998825683. The next prime is 998825731. The reversal of 998825684 is 486528899.

It can be written as a sum of positive squares in 4 ways, for example, as 133171600 + 865654084 = 11540^2 + 29422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998825683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69119 + ... + 82310.

It is an arithmetic number, because the mean of its divisors is an integer number (77910735).

Almost surely, 2^998825684 is an apocalyptic number.

It is an amenable number.

998825684 is a deficient number, since it is larger than the sum of its proper divisors (871031956).

998825684 is a wasteful number, since it uses less digits than its factorization.

998825684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151547 (or 151545 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 59.

The square root of 998825684 is about 31604.2035811694. The cubic root of 998825684 is about 999.6084080091.

The spelling of 998825684 in words is "nine hundred ninety-eight million, eight hundred twenty-five thousand, six hundred eighty-four".