9903944 has 8 divisors (see below), whose sum is σ = 18569910. Its totient is φ = 4951968.

The previous prime is 9903937. The next prime is 9903947. The reversal of 9903944 is 4493099.

9903944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5943844 + 3960100 = 2438^2 + 1990^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 9903898 and 9903907.

It is not an unprimeable number, because it can be changed into a prime (9903947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618989 + ... + 619004.

Almost surely, 2^9903944 is an apocalyptic number.

It is an amenable number.

9903944 is a deficient number, since it is larger than the sum of its proper divisors (8665966).

9903944 is a wasteful number, since it uses less digits than its factorization.

9903944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237999 (or 1237995 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 9903944 is about 3147.0532248438. The cubic root of 9903944 is about 214.7514271628.

The spelling of 9903944 in words is "nine million, nine hundred three thousand, nine hundred forty-four".