3928399 has 2 divisors, whose sum is σ = 3928400. Its totient is φ = 3928398.

The previous prime is 3928391. The next prime is 3928417. The reversal of 3928399 is 9938293.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3928399 - 2³ = 3928391 is a prime.

3928399 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964199 + 1964200.

It is an arithmetic number, because the mean of its divisors is an integer number (1964200).

Almost surely, 2^3928399 is an apocalyptic number.

3928399 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928399 is an equidigital number, since it uses as much as digits as its factorization.

3928399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 3928399 is about 1982.0189201922. The cubic root of 3928399 is about 157.7872343109.

The spelling of 3928399 in words is "three million, nine hundred twenty-eight thousand, three hundred ninety-nine".