6427986 has 16 divisors (see below), whose sum is σ = 12881568. Its totient is φ = 2138400.

The previous prime is 6427979. The next prime is 6427987. The reversal of 6427986 is 6897246.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6427987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4206 + ... + 5526.

It is an arithmetic number, because the mean of its divisors is an integer number (805098).

Almost surely, 2^6427986 is an apocalyptic number.

6427986 is an abundant number, since it is smaller than the sum of its proper divisors (6453582).

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

6427986 is a wasteful number, since it uses less digits than its factorization.

6427986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137.

The product of its digits is 145152, while the sum is 42.

The square root of 6427986 is about 2535.3473134859. The cubic root of 6427986 is about 185.9337838063.

The spelling of 6427986 in words is "six million, four hundred twenty-seven thousand, nine hundred eighty-six".