6402866 has 8 divisors (see below), whose sum is σ = 9639324. Its totient is φ = 3189760.

The previous prime is 6402859. The next prime is 6402883. The reversal of 6402866 is 6682046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6105841 + 297025 = 2471^2 + 545^2 .

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

It is a congruent number.

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, 5135 + ... + 6258.

Almost surely, 2^6402866 is an apocalyptic number.

6402866 is a deficient number, since it is larger than the sum of its proper divisors (3236458).

6402866 is a wasteful number, since it uses less digits than its factorization.

6402866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 6402866 is about 2530.3885077197. The cubic root of 6402866 is about 185.6912633620.

The spelling of 6402866 in words is "six million, four hundred two thousand, eight hundred sixty-six".