9988408 has 8 divisors (see below), whose sum is σ = 18728280. Its totient is φ = 4994200.

The previous prime is 9988403. The next prime is 9988411. The reversal of 9988408 is 8048899.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624268 + ... + 624283.

It is an arithmetic number, because the mean of its divisors is an integer number (2341035).

Almost surely, 2^9988408 is an apocalyptic number.

It is an amenable number.

9988408 is a deficient number, since it is larger than the sum of its proper divisors (8739872).

9988408 is a wasteful number, since it uses less digits than its factorization.

9988408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248557 (or 1248553 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 9988408 is about 3160.4442725668. Note that the first 3 decimals coincide. The cubic root of 9988408 is about 215.3601894593.

The spelling of 9988408 in words is "nine million, nine hundred eighty-eight thousand, four hundred eight".