9907988 has 12 divisors (see below), whose sum is σ = 17633280. Its totient is φ = 4869912.

The previous prime is 9907951. The next prime is 9907993. The reversal of 9907988 is 8897099.

9907988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 20756 + ... + 21227.

It is an arithmetic number, because the mean of its divisors is an integer number (1469440).

Almost surely, 2^9907988 is an apocalyptic number.

It is an amenable number.

9907988 is a deficient number, since it is larger than the sum of its proper divisors (7725292).

9907988 is a wasteful number, since it uses less digits than its factorization.

9907988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42046 (or 42044 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 9907988 is about 3147.6956650858. The cubic root of 9907988 is about 214.7806524423.

The spelling of 9907988 in words is "nine million, nine hundred seven thousand, nine hundred eighty-eight".