9905388 has 24 divisors (see below), whose sum is σ = 23185008. Its totient is φ = 3291456.

The previous prime is 9905383. The next prime is 9905411. The reversal of 9905388 is 8835099.

9905388 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9905388² = 196233422861088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9905383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3370 + ... + 5582.

It is an arithmetic number, because the mean of its divisors is an integer number (966042).

Almost surely, 2^9905388 is an apocalyptic number.

It is an amenable number.

9905388 is an abundant number, since it is smaller than the sum of its proper divisors (13279620).

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

9905388 is a wasteful number, since it uses less digits than its factorization.

9905388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593 (or 2591 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 9905388 is about 3147.2826374509. The cubic root of 9905388 is about 214.7618636109.

The spelling of 9905388 in words is "nine million, nine hundred five thousand, three hundred eighty-eight".