9938825 has 24 divisors (see below), whose sum is σ = 13546008. Its totient is φ = 7188480.

The previous prime is 9938821. The next prime is 9938827. The reversal of 9938825 is 5288399.

It can be written as a sum of positive squares in 12 ways, for example, as 678976 + 9259849 = 824^2 + 3043^2 .

It is not a de Polignac number, because 9938825 - 2² = 9938821 is a prime.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (155520) is a multiple of the sum of its prime divisors (648).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9938821) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16937 + ... + 17513.

It is an arithmetic number, because the mean of its divisors is an integer number (564417).

Almost surely, 2^9938825 is an apocalyptic number.

It is an amenable number.

9938825 is a deficient number, since it is larger than the sum of its proper divisors (3607183).

9938825 is a wasteful number, since it uses less digits than its factorization.

9938825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 648 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 9938825 is about 3152.5902048950. The cubic root of 9938825 is about 215.0032449483.

The spelling of 9938825 in words is "nine million, nine hundred thirty-eight thousand, eight hundred twenty-five".