8398998 has 16 divisors (see below), whose sum is σ = 18664560. Its totient is φ = 2799648.

The previous prime is 8398997. The next prime is 8399011. The reversal of 8398998 is 8998938.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 155537 = 8398998 / (8 + 3 + 9 + 8 + 9 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8398993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77715 + ... + 77822.

It is an arithmetic number, because the mean of its divisors is an integer number (1166535).

Almost surely, 2^8398998 is an apocalyptic number.

8398998 is an abundant number, since it is smaller than the sum of its proper divisors (10265562).

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

8398998 is a wasteful number, since it uses less digits than its factorization.

8398998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155548 (or 155542 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 8398998 is about 2898.1024826600. The cubic root of 8398998 is about 203.2711882705.

The spelling of 8398998 in words is "eight million, three hundred ninety-eight thousand, nine hundred ninety-eight".