6445628 has 24 divisors (see below), whose sum is σ = 12964224. Its totient is φ = 2746800.

The previous prime is 6445619. The next prime is 6445639. The reversal of 6445628 is 8265446.

It is a super-2 number, since 2×6445628² = 83092240628768, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 5363 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (540176).

Almost surely, 2^6445628 is an apocalyptic number.

It is an amenable number.

6445628 is an abundant number, since it is smaller than the sum of its proper divisors (6518596).

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

6445628 is a wasteful number, since it uses less digits than its factorization.

6445628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1311 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 6445628 is about 2538.8241372730. The cubic root of 6445628 is about 186.1037306315.

The spelling of 6445628 in words is "six million, four hundred forty-five thousand, six hundred twenty-eight".