8999998 has 16 divisors (see below), whose sum is σ = 15567840. Its totient is φ = 3822336.

The previous prime is 8999993. The next prime is 9000011.

8999998 is nontrivially palindromic in base 10.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1263 + ... + 4426.

It is an arithmetic number, because the mean of its divisors is an integer number (972990).

Almost surely, 2^8999998 is an apocalyptic number.

8999998 is a deficient number, since it is larger than the sum of its proper divisors (6567842).

8999998 is a wasteful number, since it uses less digits than its factorization.

8999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5811.

The product of its digits is 3779136, while the sum is 61.

The square root of 8999998 is about 2999.9996666666. Note that the first 3 decimals coincide. The cubic root of 8999998 is about 208.0083668972.

The spelling of 8999998 in words is "eight million, nine hundred ninety-nine thousand, nine hundred ninety-eight".