998642648 has 16 divisors (see below), whose sum is σ = 1877764680. Its totient is φ = 497905408.

The previous prime is 998642647. The next prime is 998642683. The reversal of 998642648 is 846246899.

998642648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 998642593 and 998642602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998642647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173990 + ... + 179637.

Almost surely, 2^998642648 is an apocalyptic number.

It is an amenable number.

998642648 is a deficient number, since it is larger than the sum of its proper divisors (879122032).

998642648 is a wasteful number, since it uses less digits than its factorization.

998642648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353986 (or 353982 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The square root of 998642648 is about 31601.3076944610. The cubic root of 998642648 is about 999.5473444672.

The spelling of 998642648 in words is "nine hundred ninety-eight million, six hundred forty-two thousand, six hundred forty-eight".