6390787 has 8 divisors (see below), whose sum is σ = 6996080. Its totient is φ = 5801760.

The previous prime is 6390763. The next prime is 6390799. The reversal of 6390787 is 7870936.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6390787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6390887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3237 + ... + 4822.

It is an arithmetic number, because the mean of its divisors is an integer number (874510).

Almost surely, 2^6390787 is an apocalyptic number.

6390787 is a deficient number, since it is larger than the sum of its proper divisors (605293).

6390787 is a wasteful number, since it uses less digits than its factorization.

6390787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8133.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 6390787 is about 2528.0005933544. Note that the first 3 decimals coincide. The cubic root of 6390787 is about 185.5744210656.

The spelling of 6390787 in words is "six million, three hundred ninety thousand, seven hundred eighty-seven".