6428911 has 4 divisors (see below), whose sum is σ = 6451912. Its totient is φ = 6405912.

The previous prime is 6428879. The next prime is 6428921. The reversal of 6428911 is 1198246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6428911 - 2⁵ = 6428879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428921) 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, 11076 + ... + 11641.

It is an arithmetic number, because the mean of its divisors is an integer number (1612978).

Almost surely, 2^6428911 is an apocalyptic number.

6428911 is a deficient number, since it is larger than the sum of its proper divisors (23001).

6428911 is a wasteful number, since it uses less digits than its factorization.

6428911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23000.

The product of its digits is 3456, while the sum is 31.

The square root of 6428911 is about 2535.5297276901. The cubic root of 6428911 is about 185.9427021260.

The spelling of 6428911 in words is "six million, four hundred twenty-eight thousand, nine hundred eleven".