9905944 has 16 divisors (see below), whose sum is σ = 18626400. Its totient is φ = 4938912.

The previous prime is 9905941. The next prime is 9905947. The reversal of 9905944 is 4495099.

It is an interprime number because it is at equal distance from previous prime (9905941) and next prime (9905947).

It is a super-2 number, since 2×9905944² = 196255453062272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9905897 and 9905906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9905941) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1617 + ... + 4735.

It is an arithmetic number, because the mean of its divisors is an integer number (1164150).

Almost surely, 2^9905944 is an apocalyptic number.

It is an amenable number.

9905944 is a deficient number, since it is larger than the sum of its proper divisors (8720456).

9905944 is a wasteful number, since it uses less digits than its factorization.

9905944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 9905944 is about 3147.3709663781. The cubic root of 9905944 is about 214.7658818066.

The spelling of 9905944 in words is "nine million, nine hundred five thousand, nine hundred forty-four".