6390287 has 4 divisors (see below), whose sum is σ = 6423936. Its totient is φ = 6356640.

The previous prime is 6390281. The next prime is 6390313. The reversal of 6390287 is 7820936.

6390287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6390287 - 2⁸ = 6390031 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 (6390281) 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, 16538 + ... + 16919.

It is an arithmetic number, because the mean of its divisors is an integer number (1605984).

Almost surely, 2^6390287 is an apocalyptic number.

6390287 is a deficient number, since it is larger than the sum of its proper divisors (33649).

6390287 is a wasteful number, since it uses less digits than its factorization.

6390287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33648.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 6390287 is about 2527.9016990382. The cubic root of 6390287 is about 185.5695813053.

The spelling of 6390287 in words is "six million, three hundred ninety thousand, two hundred eighty-seven".