28844646 has 8 divisors (see below), whose sum is σ = 57689304. Its totient is φ = 9614880.

The previous prime is 28844623. The next prime is 28844659. The reversal of 28844646 is 64644882.

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

28844646 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28844598 and 28844607.

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, 2403715 + ... + 2403726.

It is an arithmetic number, because the mean of its divisors is an integer number (7211163).

Almost surely, 2^28844646 is an apocalyptic number.

28844646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28844646 is a wasteful number, since it uses less digits than its factorization.

28844646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4807446.

The product of its digits is 294912, while the sum is 42.

The square root of 28844646 is about 5370.7211806237. The cubic root of 28844646 is about 306.6820830834.

The spelling of 28844646 in words is "twenty-eight million, eight hundred forty-four thousand, six hundred forty-six".