998981216 has 12 divisors (see below), whose sum is σ = 1966744332. Its totient is φ = 499490592.

The previous prime is 998981161. The next prime is 998981219. The reversal of 998981216 is 612189899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998981219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15609050 + ... + 15609113.

It is an arithmetic number, because the mean of its divisors is an integer number (163895361).

Almost surely, 2^998981216 is an apocalyptic number.

It is an amenable number.

998981216 is a deficient number, since it is larger than the sum of its proper divisors (967763116).

998981216 is a wasteful number, since it uses less digits than its factorization.

998981216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31218173 (or 31218165 counting only the distinct ones).

The product of its digits is 559872, while the sum is 53.

The square root of 998981216 is about 31606.6641074315. The cubic root of 998981216 is about 999.6602899435.

The spelling of 998981216 in words is "nine hundred ninety-eight million, nine hundred eighty-one thousand, two hundred sixteen".