998881416 has 128 divisors (see below), whose sum is σ = 3012710400. Its totient is φ = 304819200.

The previous prime is 998881391. The next prime is 998881417. The reversal of 998881416 is 614188899.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (998881417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355216 + ... + 358016.

It is an arithmetic number, because the mean of its divisors is an integer number (23536800).

Almost surely, 2^998881416 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 998881416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506355200).

998881416 is an abundant number, since it is smaller than the sum of its proper divisors (2013828984).

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

998881416 is a wasteful number, since it uses less digits than its factorization.

998881416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956 (or 2946 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 998881416 is about 31605.0852870230. The cubic root of 998881416 is about 999.6269995546.

The spelling of 998881416 in words is "nine hundred ninety-eight million, eight hundred eighty-one thousand, four hundred sixteen".