6386890 has 8 divisors (see below), whose sum is σ = 11496420. Its totient is φ = 2554752.

The previous prime is 6386839. The next prime is 6386923. The reversal of 6386890 is 986836.

It can be written as a sum of positive squares in 2 ways, for example, as 6295081 + 91809 = 2509^2 + 303^2 .

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

It is an unprimeable number.

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, 319335 + ... + 319354.

Almost surely, 2^6386890 is an apocalyptic number.

6386890 is a deficient number, since it is larger than the sum of its proper divisors (5109530).

6386890 is a wasteful number, since it uses less digits than its factorization.

6386890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638696.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 6386890 is about 2527.2297085940. The cubic root of 6386890 is about 185.5366932884.

The spelling of 6386890 in words is "six million, three hundred eighty-six thousand, eight hundred ninety".