3928047 has 4 divisors (see below), whose sum is σ = 5237400. Its totient is φ = 2618696.

The previous prime is 3928039. The next prime is 3928049. The reversal of 3928047 is 7408293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7408293 = 3 ⋅2469431.

It is a cyclic number.

It is not a de Polignac number, because 3928047 - 2³ = 3928039 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 3927999 and 3928017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654672 + ... + 654677.

It is an arithmetic number, because the mean of its divisors is an integer number (1309350).

Almost surely, 2^3928047 is an apocalyptic number.

3928047 is a deficient number, since it is larger than the sum of its proper divisors (1309353).

3928047 is a wasteful number, since it uses less digits than its factorization.

3928047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309352.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3928047 is about 1981.9301198579. The cubic root of 3928047 is about 157.7825213846.

The spelling of 3928047 in words is "three million, nine hundred twenty-eight thousand, forty-seven".