3938647 has 6 divisors (see below), whose sum is σ = 4026488. Its totient is φ = 3852684.

The previous prime is 3938639. The next prime is 3938653. The reversal of 3938647 is 7468393.

It is not a de Polignac number, because 3938647 - 2³ = 3938639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1318 + ... + 3100.

Almost surely, 2^3938647 is an apocalyptic number.

3938647 is a deficient number, since it is larger than the sum of its proper divisors (87841).

3938647 is an equidigital number, since it uses as much as digits as its factorization.

3938647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1830 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 3938647 is about 1984.6024790874. The cubic root of 3938647 is about 157.9243214993.

The spelling of 3938647 in words is "three million, nine hundred thirty-eight thousand, six hundred forty-seven".