9988646 has 8 divisors (see below), whose sum is σ = 15019824. Its totient is φ = 4982040.

The previous prime is 9988633. The next prime is 9988687. The reversal of 9988646 is 6468899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 9988594 and 9988603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5090 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (1877478).

Almost surely, 2^9988646 is an apocalyptic number.

9988646 is a deficient number, since it is larger than the sum of its proper divisors (5031178).

9988646 is a wasteful number, since it uses less digits than its factorization.

9988646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12286.

The product of its digits is 746496, while the sum is 50.

The square root of 9988646 is about 3160.4819252766. The cubic root of 9988646 is about 215.3618999527.

The spelling of 9988646 in words is "nine million, nine hundred eighty-eight thousand, six hundred forty-six".