3938247 has 8 divisors (see below), whose sum is σ = 5834480. Its totient is φ = 2625480.

The previous prime is 3938197. The next prime is 3938251. The reversal of 3938247 is 7428393.

It is not a de Polignac number, because 3938247 - 2⁷ = 3938119 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938257) 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 7 ways as a sum of consecutive naturals, for example, 72904 + ... + 72957.

It is an arithmetic number, because the mean of its divisors is an integer number (729310).

Almost surely, 2^3938247 is an apocalyptic number.

3938247 is a deficient number, since it is larger than the sum of its proper divisors (1896233).

3938247 is a wasteful number, since it uses less digits than its factorization.

3938247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145870 (or 145864 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 3938247 is about 1984.5017006795. The cubic root of 3938247 is about 157.9189751737.

The spelling of 3938247 in words is "three million, nine hundred thirty-eight thousand, two hundred forty-seven".