9920988 has 96 divisors (see below), whose sum is σ = 32094720. Its totient is φ = 2574720.

The previous prime is 9920957. The next prime is 9920993. The reversal of 9920988 is 8890299.

It is a super-2 number, since 2×9920988² = 196852005792288, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7720 + ... + 8912.

It is an arithmetic number, because the mean of its divisors is an integer number (334320).

Almost surely, 2^9920988 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 9920988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16047360).

9920988 is an abundant number, since it is smaller than the sum of its proper divisors (22173732).

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

9920988 is a wasteful number, since it uses less digits than its factorization.

9920988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 9920988 is about 3149.7599908564. The cubic root of 9920988 is about 214.8745473281.

The spelling of 9920988 in words is "nine million, nine hundred twenty thousand, nine hundred eighty-eight".