6463986 has 16 divisors (see below), whose sum is σ = 13172544. Its totient is φ = 2113904.

The previous prime is 6463979. The next prime is 6463991. The reversal of 6463986 is 6893646.

It is a d-powerful number, because it can be written as 6 + 4³ + 6⁴ + 3³ + 9⁷ + 8 + 6⁸ .

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 7 ways as a sum of consecutive naturals, for example, 9846 + ... + 10481.

It is an arithmetic number, because the mean of its divisors is an integer number (823284).

Almost surely, 2^6463986 is an apocalyptic number.

6463986 is an abundant number, since it is smaller than the sum of its proper divisors (6708558).

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

6463986 is a wasteful number, since it uses less digits than its factorization.

6463986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20385.

The product of its digits is 186624, while the sum is 42.

The square root of 6463986 is about 2542.4370198689. The cubic root of 6463986 is about 186.2802458275.

The spelling of 6463986 in words is "six million, four hundred sixty-three thousand, nine hundred eighty-six".