6386985 has 96 divisors (see below), whose sum is σ = 13789440. Its totient is φ = 2787840.

The previous prime is 6386981. The next prime is 6387001. The reversal of 6386985 is 5896836.

6386985 = T₈₆ + T₈₇ + ... + T₃₃₈.

6386985 is a `hidden beast` number, since 638 + 6 + 9 + 8 + 5 = 666.

It is not a de Polignac number, because 6386985 - 2² = 6386981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6386985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6386981) 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 95 ways as a sum of consecutive naturals, for example, 277684 + ... + 277706.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

Almost surely, 2^6386985 is an apocalyptic number.

It is an amenable number.

6386985 is an abundant number, since it is smaller than the sum of its proper divisors (7402455).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6386985 is a wasteful number, since it uses less digits than its factorization.

6386985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 59 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 6386985 is about 2527.2485038080. The cubic root of 6386985 is about 185.5376131883.

The spelling of 6386985 in words is "six million, three hundred eighty-six thousand, nine hundred eighty-five".