6428887 has 8 divisors (see below), whose sum is σ = 6613376. Its totient is φ = 6246072.

The previous prime is 6428879. The next prime is 6428921. The reversal of 6428887 is 7888246.

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

It is a cyclic number.

It is not a de Polignac number, because 6428887 - 2³ = 6428879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428827) 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 7 ways as a sum of consecutive naturals, for example, 12958 + ... + 13444.

It is an arithmetic number, because the mean of its divisors is an integer number (826672).

Almost surely, 2^6428887 is an apocalyptic number.

6428887 is a deficient number, since it is larger than the sum of its proper divisors (184489).

6428887 is a wasteful number, since it uses less digits than its factorization.

6428887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837.

The product of its digits is 172032, while the sum is 43.

The square root of 6428887 is about 2535.5249949468. The cubic root of 6428887 is about 185.9424707425.

The spelling of 6428887 in words is "six million, four hundred twenty-eight thousand, eight hundred eighty-seven".