6402786 has 64 divisors (see below), whose sum is σ = 14902272. Its totient is φ = 1818432.

The previous prime is 6402779. The next prime is 6402787. The reversal of 6402786 is 6872046.

It is not an unprimeable number, because it can be changed into a prime (6402787) 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 31 ways as a sum of consecutive naturals, for example, 77101 + ... + 77183.

It is an arithmetic number, because the mean of its divisors is an integer number (232848).

Almost surely, 2^6402786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6402786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7451136).

6402786 is an abundant number, since it is smaller than the sum of its proper divisors (8499486).

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

6402786 is a wasteful number, since it uses less digits than its factorization.

6402786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6402786 is about 2530.3726998211. The cubic root of 6402786 is about 185.6904899915.

The spelling of 6402786 in words is "six million, four hundred two thousand, seven hundred eighty-six".