3928471 has 4 divisors (see below), whose sum is σ = 3932944. Its totient is φ = 3924000.

The previous prime is 3928453. The next prime is 3928487. The reversal of 3928471 is 1748293.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1748293 = 179 ⋅9767.

It is a cyclic number.

It is not a de Polignac number, because 3928471 - 2¹¹ = 3926423 is a prime.

It is a super-3 number, since 3×3928471³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928451) 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, 435 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (983236).

Almost surely, 2^3928471 is an apocalyptic number.

3928471 is a deficient number, since it is larger than the sum of its proper divisors (4473).

3928471 is a wasteful number, since it uses less digits than its factorization.

3928471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472.

The product of its digits is 12096, while the sum is 34.

The square root of 3928471 is about 1982.0370834069. The cubic root of 3928471 is about 157.7881982839.

The spelling of 3928471 in words is "three million, nine hundred twenty-eight thousand, four hundred seventy-one".