3938399 has 4 divisors (see below), whose sum is σ = 3955536. Its totient is φ = 3921264.

The previous prime is 3938393. The next prime is 3938437. The reversal of 3938399 is 9938393.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3938399 - 2⁴ = 3938383 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 (3938393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8219 + ... + 8684.

It is an arithmetic number, because the mean of its divisors is an integer number (988884).

Almost surely, 2^3938399 is an apocalyptic number.

3938399 is a deficient number, since it is larger than the sum of its proper divisors (17137).

3938399 is a wasteful number, since it uses less digits than its factorization.

3938399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17136.

The product of its digits is 157464, while the sum is 44.

The square root of 3938399 is about 1984.5399970774. The cubic root of 3938399 is about 157.9210068201.

The spelling of 3938399 in words is "three million, nine hundred thirty-eight thousand, three hundred ninety-nine".