3928447 has 2 divisors, whose sum is σ = 3928448. Its totient is φ = 3928446.

The previous prime is 3928429. The next prime is 3928451. The reversal of 3928447 is 7448293.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7448293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3928447 - 2⁷ = 3928319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964223 + 1964224.

It is an arithmetic number, because the mean of its divisors is an integer number (1964224).

Almost surely, 2^3928447 is an apocalyptic number.

3928447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928447 is an equidigital number, since it uses as much as digits as its factorization.

3928447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 3928447 is about 1982.0310290205. The cubic root of 3928447 is about 157.7878769609.

The spelling of 3928447 in words is "three million, nine hundred twenty-eight thousand, four hundred forty-seven".