28844644 has 12 divisors (see below), whose sum is σ = 50578668. Its totient is φ = 14393600.

The previous prime is 28844623. The next prime is 28844659. The reversal of 28844644 is 44644882.

It can be written as a sum of positive squares in 2 ways, for example, as 8702500 + 20142144 = 2950^2 + 4488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28844597 and 28844606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4837 + ... + 9004.

It is an arithmetic number, because the mean of its divisors is an integer number (4214889).

Almost surely, 2^28844644 is an apocalyptic number.

It is an amenable number.

28844644 is a deficient number, since it is larger than the sum of its proper divisors (21734024).

28844644 is a wasteful number, since it uses less digits than its factorization.

28844644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14366 (or 14364 counting only the distinct ones).

The product of its digits is 196608, while the sum is 40.

The square root of 28844644 is about 5370.7209944290. The cubic root of 28844644 is about 306.6820759953.

The spelling of 28844644 in words is "twenty-eight million, eight hundred forty-four thousand, six hundred forty-four".