3928393 has 4 divisors (see below), whose sum is σ = 4489600. Its totient is φ = 3367188.

The previous prime is 3928391. The next prime is 3928399. The reversal of 3928393 is 3938293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3938293 = 101 ⋅38993.

It is a cyclic number.

It is not a de Polignac number, because 3928393 - 2¹ = 3928391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928391) 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 3 ways as a sum of consecutive naturals, for example, 280593 + ... + 280606.

It is an arithmetic number, because the mean of its divisors is an integer number (1122400).

Almost surely, 2^3928393 is an apocalyptic number.

It is an amenable number.

3928393 is a deficient number, since it is larger than the sum of its proper divisors (561207).

3928393 is an equidigital number, since it uses as much as digits as its factorization.

3928393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561206.

The product of its digits is 34992, while the sum is 37.

The square root of 3928393 is about 1982.0174065835. The cubic root of 3928393 is about 157.7871539793.

The spelling of 3928393 in words is "three million, nine hundred twenty-eight thousand, three hundred ninety-three".