9998439 has 8 divisors (see below), whose sum is σ = 14543232. Its totient is φ = 6059640.

The previous prime is 9998423. The next prime is 9998441. The reversal of 9998439 is 9348999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9998439 - 2⁴ = 9998423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9998391 and 9998400.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151459 + ... + 151524.

It is an arithmetic number, because the mean of its divisors is an integer number (1817904).

Almost surely, 2^9998439 is an apocalyptic number.

9998439 is a deficient number, since it is larger than the sum of its proper divisors (4544793).

9998439 is a wasteful number, since it uses less digits than its factorization.

9998439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302997.

The product of its digits is 629856, while the sum is 51.

The square root of 9998439 is about 3162.0308347643. The cubic root of 9998439 is about 215.4322581780.

The spelling of 9998439 in words is "nine million, nine hundred ninety-eight thousand, four hundred thirty-nine".