28065546 has 48 divisors (see below), whose sum is σ = 64584000. Its totient is φ = 8783424.

The previous prime is 28065539. The next prime is 28065581. The reversal of 28065546 is 64556082.

It is a self number, because there is not a number n which added to its sum of digits gives 28065546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46555 + ... + 47153.

It is an arithmetic number, because the mean of its divisors is an integer number (1345500).

Almost surely, 2^28065546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28065546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32292000).

28065546 is an abundant number, since it is smaller than the sum of its proper divisors (36518454).

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

28065546 is a wasteful number, since it uses less digits than its factorization.

28065546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 28065546 is about 5297.6925165585. The cubic root of 28065546 is about 303.8956604644.

The spelling of 28065546 in words is "twenty-eight million, sixty-five thousand, five hundred forty-six".