998825685 has 64 divisors (see below), whose sum is σ = 1942375680. Its totient is φ = 431585280.

The previous prime is 998825683. The next prime is 998825731. The reversal of 998825685 is 586528899.

It is not a de Polignac number, because 998825685 - 2¹ = 998825683 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 (998825683) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54177 + ... + 70233.

It is an arithmetic number, because the mean of its divisors is an integer number (30349620).

Almost surely, 2^998825685 is an apocalyptic number.

It is an amenable number.

998825685 is a deficient number, since it is larger than the sum of its proper divisors (943549995).

998825685 is a wasteful number, since it uses less digits than its factorization.

998825685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16118.

The product of its digits is 12441600, while the sum is 60.

The square root of 998825685 is about 31604.2035969901. The cubic root of 998825685 is about 999.6084083427.

The spelling of 998825685 in words is "nine hundred ninety-eight million, eight hundred twenty-five thousand, six hundred eighty-five".