9939440 has 40 divisors (see below), whose sum is σ = 26412000. Its totient is φ = 3407616.

The previous prime is 9939403. The next prime is 9939463. The reversal of 9939440 is 449399.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 9939394 and 9939403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8315 + ... + 9434.

It is an arithmetic number, because the mean of its divisors is an integer number (660300).

Almost surely, 2^9939440 is an apocalyptic number.

It is an amenable number.

9939440 is an abundant number, since it is smaller than the sum of its proper divisors (16472560).

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

9939440 is a wasteful number, since it uses less digits than its factorization.

9939440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17769 (or 17763 counting only the distinct ones).

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

The square root of 9939440 is about 3152.6877422288. The cubic root of 9939440 is about 215.0076795526.

The spelling of 9939440 in words is "nine million, nine hundred thirty-nine thousand, four hundred forty".