28516544 has 56 divisors (see below), whose sum is σ = 65946528. Its totient is φ = 11980800.

The previous prime is 28516519. The next prime is 28516583. The reversal of 28516544 is 44561582.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23144 + ... + 24344.

Almost surely, 2^28516544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28516544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32973264).

28516544 is an abundant number, since it is smaller than the sum of its proper divisors (37429984).

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

28516544 is a wasteful number, since it uses less digits than its factorization.

28516544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1263 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 28516544 is about 5340.0883887816. The cubic root of 28516544 is about 305.5148305736.

The spelling of 28516544 in words is "twenty-eight million, five hundred sixteen thousand, five hundred forty-four".