6284639 has 4 divisors (see below), whose sum is σ = 6290256. Its totient is φ = 6279024.

The previous prime is 6284633. The next prime is 6284669. The reversal of 6284639 is 9364826.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6284639 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6284633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494 + ... + 3579.

It is an arithmetic number, because the mean of its divisors is an integer number (1572564).

Almost surely, 2^6284639 is an apocalyptic number.

6284639 is a deficient number, since it is larger than the sum of its proper divisors (5617).

6284639 is a wasteful number, since it uses less digits than its factorization.

6284639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616.

The product of its digits is 62208, while the sum is 38.

The square root of 6284639 is about 2506.9182276253. The cubic root of 6284639 is about 184.5412446379.

The spelling of 6284639 in words is "six million, two hundred eighty-four thousand, six hundred thirty-nine".