9998635 has 16 divisors (see below), whose sum is σ = 12873600. Its totient is φ = 7428096.

The previous prime is 9998633. The next prime is 9998641. The reversal of 9998635 is 5368999.

It is a cyclic number.

It is not a de Polignac number, because 9998635 - 2¹ = 9998633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9998633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5971 + ... + 7459.

It is an arithmetic number, because the mean of its divisors is an integer number (804600).

Almost surely, 2^9998635 is an apocalyptic number.

9998635 is a deficient number, since it is larger than the sum of its proper divisors (2874965).

9998635 is a wasteful number, since it uses less digits than its factorization.

9998635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590.

The product of its digits is 524880, while the sum is 49.

The square root of 9998635 is about 3162.0618273525. The cubic root of 9998635 is about 215.4336658793.

The spelling of 9998635 in words is "nine million, nine hundred ninety-eight thousand, six hundred thirty-five".