9998859 has 32 divisors (see below), whose sum is σ = 15289344. Its totient is φ = 5765760.

The previous prime is 9998851. The next prime is 9998861. The reversal of 9998859 is 9588999.

9998859 = 871² + 872² + ... + 883².

It is not a de Polignac number, because 9998859 - 2³ = 9998851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9998799 and 9998808.

It is not an unprimeable number, because it can be changed into a prime (9998851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63609 + ... + 63765.

It is an arithmetic number, because the mean of its divisors is an integer number (477792).

Almost surely, 2^9998859 is an apocalyptic number.

9998859 is a deficient number, since it is larger than the sum of its proper divisors (5290485).

9998859 is a wasteful number, since it uses less digits than its factorization.

9998859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267.

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

The square root of 9998859 is about 3162.0972470814. The cubic root of 9998859 is about 215.4352746583.

The spelling of 9998859 in words is "nine million, nine hundred ninety-eight thousand, eight hundred fifty-nine".