6428869 has 8 divisors (see below), whose sum is σ = 6547968. Its totient is φ = 6311040.

The previous prime is 6428857. The next prime is 6428879. The reversal of 6428869 is 9688246.

It is a happy number.

6428869 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6428869 is a prime.

It is a super-2 number, since 2×6428869² = 82660713238322, which contains 22 as substring.

It is a Duffinian number.

6428869 is a lucky number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 18354 + ... + 18700.

It is an arithmetic number, because the mean of its divisors is an integer number (818496).

Almost surely, 2^6428869 is an apocalyptic number.

It is an amenable number.

6428869 is a deficient number, since it is larger than the sum of its proper divisors (119099).

6428869 is a wasteful number, since it uses less digits than its factorization.

6428869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its digits is 165888, while the sum is 43.

The square root of 6428869 is about 2535.5214453836. The cubic root of 6428869 is about 185.9422972046.

The spelling of 6428869 in words is "six million, four hundred twenty-eight thousand, eight hundred sixty-nine".