9998738 has 8 divisors (see below), whose sum is σ = 15023232. Its totient is φ = 4990996.

The previous prime is 9998719. The next prime is 9998741. The reversal of 9998738 is 8378999.

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

It is a super-3 number, since 3×9998738³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9998738.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2570 + ... + 5157.

It is an arithmetic number, because the mean of its divisors is an integer number (1877904).

Almost surely, 2^9998738 is an apocalyptic number.

9998738 is a deficient number, since it is larger than the sum of its proper divisors (5024494).

9998738 is a wasteful number, since it uses less digits than its factorization.

9998738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8376.

The product of its digits is 979776, while the sum is 53.

The square root of 9998738 is about 3162.0781141521. The cubic root of 9998738 is about 215.4344056333.

The spelling of 9998738 in words is "nine million, nine hundred ninety-eight thousand, seven hundred thirty-eight".