989993016 has 160 divisors (see below), whose sum is σ = 2876876640. Its totient is φ = 317820672.

The previous prime is 989993009. The next prime is 989993023. The reversal of 989993016 is 610399989.

It is an interprime number because it is at equal distance from previous prime (989993009) and next prime (989993023).

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3764101 + ... + 3764363.

It is an arithmetic number, because the mean of its divisors is an integer number (17980479).

Almost surely, 2^989993016 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 989993016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438438320).

989993016 is an abundant number, since it is smaller than the sum of its proper divisors (1886883624).

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

989993016 is a wasteful number, since it uses less digits than its factorization.

989993016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 989993016 is about 31464.1544618634. The cubic root of 989993016 is about 996.6531497566.

The spelling of 989993016 in words is "nine hundred eighty-nine million, nine hundred ninety-three thousand, sixteen".