6479644 has 24 divisors (see below), whose sum is σ = 11889360. Its totient is φ = 3085824.

The previous prime is 6479633. The next prime is 6479647. The reversal of 6479644 is 4469746.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 6³ + 4 + 7⁵ + 9⁷ + 6⁸ + 4² + 4² .

It is a junction number, because it is equal to n+sod(n) for n = 6479597 and 6479606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6479647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9292 + ... + 9964.

It is an arithmetic number, because the mean of its divisors is an integer number (495390).

Almost surely, 2^6479644 is an apocalyptic number.

It is an amenable number.

6479644 is a deficient number, since it is larger than the sum of its proper divisors (5409716).

6479644 is a wasteful number, since it uses less digits than its factorization.

6479644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 787 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 6479644 is about 2545.5144863072. The cubic root of 6479644 is about 186.4305361750.

The spelling of 6479644 in words is "six million, four hundred seventy-nine thousand, six hundred forty-four".