6428289 has 16 divisors (see below), whose sum is σ = 10311680. Its totient is φ = 3479760.

The previous prime is 6428281. The next prime is 6428291. The reversal of 6428289 is 9828246.

6428289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6428289 - 2³ = 6428281 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6428281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7657 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (644480).

Almost surely, 2^6428289 is an apocalyptic number.

It is an amenable number.

6428289 is a deficient number, since it is larger than the sum of its proper divisors (3883391).

6428289 is a wasteful number, since it uses less digits than its factorization.

6428289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140.

The product of its digits is 55296, while the sum is 39.

The square root of 6428289 is about 2535.4070679084. The cubic root of 6428289 is about 185.9367052528.

The spelling of 6428289 in words is "six million, four hundred twenty-eight thousand, two hundred eighty-nine".