28651844 has 12 divisors (see below), whose sum is σ = 53997804. Its totient is φ = 13223904.

The previous prime is 28651823. The next prime is 28651873. The reversal of 28651844 is 44815682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7840000 + 20811844 = 2800^2 + 4562^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28651798 and 28651807.

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, 275447 + ... + 275550.

It is an arithmetic number, because the mean of its divisors is an integer number (4499817).

Almost surely, 2^28651844 is an apocalyptic number.

It is an amenable number.

28651844 is a deficient number, since it is larger than the sum of its proper divisors (25345960).

28651844 is a wasteful number, since it uses less digits than its factorization.

28651844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551014 (or 551012 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 28651844 is about 5352.7417273767. The cubic root of 28651844 is about 305.9972517446.

The spelling of 28651844 in words is "twenty-eight million, six hundred fifty-one thousand, eight hundred forty-four".