6428871 has 12 divisors (see below), whose sum is σ = 9308520. Its totient is φ = 4275600.

The previous prime is 6428857. The next prime is 6428879. The reversal of 6428871 is 1788246.

6428871 is a `hidden beast` number, since 642 + 8 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 6428871 - 2⁷ = 6428743 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5800 + ... + 6818.

It is an arithmetic number, because the mean of its divisors is an integer number (775710).

Almost surely, 2^6428871 is an apocalyptic number.

6428871 is a deficient number, since it is larger than the sum of its proper divisors (2879649).

6428871 is a wasteful number, since it uses less digits than its factorization.

6428871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726 (or 1723 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 6428871 is about 2535.5218397797. The cubic root of 6428871 is about 185.9423164866.

The spelling of 6428871 in words is "six million, four hundred twenty-eight thousand, eight hundred seventy-one".