998816508 has 72 divisors (see below), whose sum is σ = 2626111488. Its totient is φ = 331945776.

The previous prime is 998816477. The next prime is 998816531. The reversal of 998816508 is 805618899.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370935 + ... + 373617.

Almost surely, 2^998816508 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 998816508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313055744).

998816508 is an abundant number, since it is smaller than the sum of its proper divisors (1627294980).

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

998816508 is a wasteful number, since it uses less digits than its factorization.

998816508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 998816508 is about 31604.0584102738. The cubic root of 998816508 is about 999.6053469361.

The spelling of 998816508 in words is "nine hundred ninety-eight million, eight hundred sixteen thousand, five hundred eight".