998111730 has 128 divisors (see below), whose sum is σ = 3031603200. Its totient is φ = 204272640.

The previous prime is 998111713. The next prime is 998111747. The reversal of 998111730 is 37111899.

It is an interprime number because it is at equal distance from previous prime (998111713) and next prime (998111747).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 151546 + ... + 157994.

It is an arithmetic number, because the mean of its divisors is an integer number (23684400).

Almost surely, 2^998111730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998111730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1515801600).

998111730 is an abundant number, since it is smaller than the sum of its proper divisors (2033491470).

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

998111730 is a wasteful number, since it uses less digits than its factorization.

998111730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544.

The product of its (nonzero) digits is 13608, while the sum is 39.

The square root of 998111730 is about 31592.9063240469. The cubic root of 998111730 is about 999.3701800768.

The spelling of 998111730 in words is "nine hundred ninety-eight million, one hundred eleven thousand, seven hundred thirty".