28066544 has 20 divisors (see below), whose sum is σ = 59322840. Its totient is φ = 12757440.

The previous prime is 28066543. The next prime is 28066579. The reversal of 28066544 is 44566082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28066543) 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, 79559 + ... + 79910.

It is an arithmetic number, because the mean of its divisors is an integer number (2966142).

Almost surely, 2^28066544 is an apocalyptic number.

It is an amenable number.

28066544 is an abundant number, since it is smaller than the sum of its proper divisors (31256296).

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

28066544 is a wasteful number, since it uses less digits than its factorization.

28066544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159488 (or 159482 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 28066544 is about 5297.7867076733. The cubic root of 28066544 is about 303.8992625592.

The spelling of 28066544 in words is "twenty-eight million, sixty-six thousand, five hundred forty-four".