6429986 has 8 divisors (see below), whose sum is σ = 9777324. Its totient is φ = 3170880.

The previous prime is 6429977. The next prime is 6430003. The reversal of 6429986 is 6899246.

It can be written as a sum of positive squares in 2 ways, for example, as 6405961 + 24025 = 2531^2 + 155^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21875 + ... + 22166.

Almost surely, 2^6429986 is an apocalyptic number.

6429986 is a deficient number, since it is larger than the sum of its proper divisors (3347338).

6429986 is a wasteful number, since it uses less digits than its factorization.

6429986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44116.

The product of its digits is 186624, while the sum is 44.

The square root of 6429986 is about 2535.7417060892. The cubic root of 6429986 is about 185.9530655848.

The spelling of 6429986 in words is "six million, four hundred twenty-nine thousand, nine hundred eighty-six".