998747898 has 8 divisors (see below), whose sum is σ = 1997495808. Its totient is φ = 332915964.

The previous prime is 998747891. The next prime is 998747917. The reversal of 998747898 is 898747899.

It is a sphenic number, since it is the product of 3 distinct primes.

998747898 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (998747891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83228986 + ... + 83228997.

It is an arithmetic number, because the mean of its divisors is an integer number (249686976).

Almost surely, 2^998747898 is an apocalyptic number.

998747898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

998747898 is a wasteful number, since it uses less digits than its factorization.

998747898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166457988.

The product of its digits is 73156608, while the sum is 69.

The square root of 998747898 is about 31602.9729297736. The cubic root of 998747898 is about 999.5824583499.

Subtracting from 998747898 its reverse (898747899), we obtain a palindrome (99999999).

The spelling of 998747898 in words is "nine hundred ninety-eight million, seven hundred forty-seven thousand, eight hundred ninety-eight".