6428646 has 40 divisors (see below), whose sum is σ = 16465680. Its totient is φ = 1836432.

The previous prime is 6428627. The next prime is 6428647. The reversal of 6428646 is 6468246.

It is a happy number.

6428646 is a `hidden beast` number, since 6 + 4 + 2 + 8 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 6428646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428647) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1701 + ... + 3968.

It is an arithmetic number, because the mean of its divisors is an integer number (411642).

Almost surely, 2^6428646 is an apocalyptic number.

6428646 is an abundant number, since it is smaller than the sum of its proper divisors (10037034).

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

6428646 is a wasteful number, since it uses less digits than its factorization.

6428646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690 (or 5681 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 6428646 is about 2535.4774698269. The cubic root of 6428646 is about 185.9401472353.

The spelling of 6428646 in words is "six million, four hundred twenty-eight thousand, six hundred forty-six".