6428387 has 4 divisors (see below), whose sum is σ = 7346736. Its totient is φ = 5510040.

The previous prime is 6428369. The next prime is 6428393. The reversal of 6428387 is 7838246.

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 6428387 - 2⁸ = 6428131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6428387.

It is not an unprimeable number, because it can be changed into a prime (6428087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459164 + ... + 459177.

It is an arithmetic number, because the mean of its divisors is an integer number (1836684).

Almost surely, 2^6428387 is an apocalyptic number.

6428387 is a deficient number, since it is larger than the sum of its proper divisors (918349).

6428387 is an equidigital number, since it uses as much as digits as its factorization.

6428387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918348.

The product of its digits is 64512, while the sum is 38.

The square root of 6428387 is about 2535.4263941199. The cubic root of 6428387 is about 185.9376501235.

The spelling of 6428387 in words is "six million, four hundred twenty-eight thousand, three hundred eighty-seven".