998018712 has 128 divisors (see below), whose sum is σ = 2889216000. Its totient is φ = 318850560.

The previous prime is 998018683. The next prime is 998018713. The reversal of 998018712 is 217810899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998018713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755989 + ... + 757307.

It is an arithmetic number, because the mean of its divisors is an integer number (22572000).

Almost surely, 2^998018712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998018712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444608000).

998018712 is an abundant number, since it is smaller than the sum of its proper divisors (1891197288).

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

998018712 is a wasteful number, since it uses less digits than its factorization.

998018712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 998018712 is about 31591.4341554796. The cubic root of 998018712 is about 999.3391340190.

The spelling of 998018712 in words is "nine hundred ninety-eight million, eighteen thousand, seven hundred twelve".