6428609 has 6 divisors (see below), whose sum is σ = 7066290. Its totient is φ = 5844080.

The previous prime is 6428573. The next prime is 6428623. The reversal of 6428609 is 9068246.

It can be written as a sum of positive squares in only one way, i.e., 6235009 + 193600 = 2497^2 + 440^2 .

It is not a de Polignac number, because 6428609 - 2⁸ = 6428353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6428809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26444 + ... + 26685.

It is an arithmetic number, because the mean of its divisors is an integer number (1177715).

Almost surely, 2^6428609 is an apocalyptic number.

It is an amenable number.

6428609 is a deficient number, since it is larger than the sum of its proper divisors (637681).

6428609 is a wasteful number, since it uses less digits than its factorization.

6428609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53151 (or 53140 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6428609 is about 2535.4701733604. The cubic root of 6428609 is about 185.9397905092.

The spelling of 6428609 in words is "six million, four hundred twenty-eight thousand, six hundred nine".