28477844 has 12 divisors (see below), whose sum is σ = 49875924. Its totient is φ = 14227584.

The previous prime is 28477843. The next prime is 28477849. The reversal of 28477844 is 44877482.

It can be written as a sum of positive squares in 2 ways, for example, as 11155600 + 17322244 = 3340^2 + 4162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28477795 and 28477804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28477843) by changing a digit.

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, 5612 + ... + 9404.

It is an arithmetic number, because the mean of its divisors is an integer number (4156327).

Almost surely, 2^28477844 is an apocalyptic number.

It is an amenable number.

28477844 is a deficient number, since it is larger than the sum of its proper divisors (21398080).

28477844 is a wasteful number, since it uses less digits than its factorization.

28477844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674 (or 5672 counting only the distinct ones).

The product of its digits is 401408, while the sum is 44.

The square root of 28477844 is about 5336.4636230373. The cubic root of 28477844 is about 305.3765625734.

The spelling of 28477844 in words is "twenty-eight million, four hundred seventy-seven thousand, eight hundred forty-four".