9998455 has 4 divisors (see below), whose sum is σ = 11998152. Its totient is φ = 7998760.

The previous prime is 9998447. The next prime is 9998459. The reversal of 9998455 is 5548999.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9998455 - 2³ = 9998447 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9998399 and 9998408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999841 + ... + 999850.

It is an arithmetic number, because the mean of its divisors is an integer number (2999538).

Almost surely, 2^9998455 is an apocalyptic number.

9998455 is a deficient number, since it is larger than the sum of its proper divisors (1999697).

9998455 is a wasteful number, since it uses less digits than its factorization.

9998455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999696.

The product of its digits is 583200, while the sum is 49.

The square root of 9998455 is about 3162.0333647829. The cubic root of 9998455 is about 215.4323730931.

The spelling of 9998455 in words is "nine million, nine hundred ninety-eight thousand, four hundred fifty-five".