9998598 has 32 divisors (see below), whose sum is σ = 21196800. Its totient is φ = 3135456.

The previous prime is 9998587. The next prime is 9998603. The reversal of 9998598 is 8958999.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25915 + ... + 26297.

It is an arithmetic number, because the mean of its divisors is an integer number (662400).

Almost surely, 2^9998598 is an apocalyptic number.

9998598 is an abundant number, since it is smaller than the sum of its proper divisors (11198202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9998598 is a wasteful number, since it uses less digits than its factorization.

9998598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 2099520, while the sum is 57.

The square root of 9998598 is about 3162.0559767341. The cubic root of 9998598 is about 215.4334001412.

The spelling of 9998598 in words is "nine million, nine hundred ninety-eight thousand, five hundred ninety-eight".