28318844 has 6 divisors (see below), whose sum is σ = 49557984. Its totient is φ = 14159420.

The previous prime is 28318813. The next prime is 28318861. The reversal of 28318844 is 44881382.

It is a junction number, because it is equal to n+sod(n) for n = 28318798 and 28318807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3539852 + ... + 3539859.

It is an arithmetic number, because the mean of its divisors is an integer number (8259664).

Almost surely, 2^28318844 is an apocalyptic number.

It is an amenable number.

28318844 is a deficient number, since it is larger than the sum of its proper divisors (21239140).

28318844 is a wasteful number, since it uses less digits than its factorization.

28318844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079715 (or 7079713 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 28318844 is about 5321.5452643006. The cubic root of 28318844 is about 304.8071664718.

The spelling of 28318844 in words is "twenty-eight million, three hundred eighteen thousand, eight hundred forty-four".