9945688 has 8 divisors (see below), whose sum is σ = 18648180. Its totient is φ = 4972840.

The previous prime is 9945679. The next prime is 9945707. The reversal of 9945688 is 8865499.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 621598 + ... + 621613.

Almost surely, 2^9945688 is an apocalyptic number.

It is an amenable number.

9945688 is a deficient number, since it is larger than the sum of its proper divisors (8702492).

9945688 is a wasteful number, since it uses less digits than its factorization.

9945688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243217 (or 1243213 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 9945688 is about 3153.6784871004. The cubic root of 9945688 is about 215.0527218822.

The spelling of 9945688 in words is "nine million, nine hundred forty-five thousand, six hundred eighty-eight".