9938215 has 8 divisors (see below), whose sum is σ = 13629600. Its totient is φ = 6814752.

The previous prime is 9938207. The next prime is 9938221. The reversal of 9938215 is 5128399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9938215 - 2³ = 9938207 is a prime.

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, 141940 + ... + 142009.

It is an arithmetic number, because the mean of its divisors is an integer number (1703700).

Almost surely, 2^9938215 is an apocalyptic number.

9938215 is a deficient number, since it is larger than the sum of its proper divisors (3691385).

9938215 is a wasteful number, since it uses less digits than its factorization.

9938215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283961.

The product of its digits is 19440, while the sum is 37.

The square root of 9938215 is about 3152.4934575666. The cubic root of 9938215 is about 214.9988462170.

It can be divided in two parts, 9938 and 215, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 9938215 in words is "nine million, nine hundred thirty-eight thousand, two hundred fifteen".