6428771 has 4 divisors (see below), whose sum is σ = 6806952. Its totient is φ = 6050592.

The previous prime is 6428767. The next prime is 6428777. The reversal of 6428771 is 1778246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1778246 = 2 ⋅889123.

It is a cyclic number.

It is not a de Polignac number, because 6428771 - 2² = 6428767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6428777) 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, 189065 + ... + 189098.

It is an arithmetic number, because the mean of its divisors is an integer number (1701738).

Almost surely, 2^6428771 is an apocalyptic number.

6428771 is a deficient number, since it is larger than the sum of its proper divisors (378181).

6428771 is a wasteful number, since it uses less digits than its factorization.

6428771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378180.

The product of its digits is 18816, while the sum is 35.

The square root of 6428771 is about 2535.5021198966. The cubic root of 6428771 is about 185.9413523812.

The spelling of 6428771 in words is "six million, four hundred twenty-eight thousand, seven hundred seventy-one".