9998505 has 32 divisors (see below), whose sum is σ = 19393920. Its totient is φ = 4847040.

The previous prime is 9998479. The next prime is 9998539. The reversal of 9998505 is 5058999.

It is not a de Polignac number, because 9998505 - 2⁶ = 9998441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1882 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (606060).

Almost surely, 2^9998505 is an apocalyptic number.

It is an amenable number.

9998505 is a deficient number, since it is larger than the sum of its proper divisors (9395415).

9998505 is a wasteful number, since it uses less digits than its factorization.

9998505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758 (or 6752 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 9998505 is about 3162.0412710779. The cubic root of 9998505 is about 215.4327322019.

The spelling of 9998505 in words is "nine million, nine hundred ninety-eight thousand, five hundred five".