9905938 has 12 divisors (see below), whose sum is σ = 17285022. Its totient is φ = 4245360.

The previous prime is 9905921. The next prime is 9905941. The reversal of 9905938 is 8395099.

It can be written as a sum of positive squares in only one way, i.e., 6036849 + 3869089 = 2457^2 + 1967^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9905894 and 9905903.

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 in 5 ways as a sum of consecutive naturals, for example, 50443 + ... + 50638.

Almost surely, 2^9905938 is an apocalyptic number.

9905938 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

9905938 is a deficient number, since it is larger than the sum of its proper divisors (7379084).

9905938 is a wasteful number, since it uses less digits than its factorization.

9905938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101097 (or 101090 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 9905938 is about 3147.3700132015. The cubic root of 9905938 is about 214.7658384455.

The spelling of 9905938 in words is "nine million, nine hundred five thousand, nine hundred thirty-eight".