28565544 has 64 divisors (see below), whose sum is σ = 82131840. Its totient is φ = 8110080.

The previous prime is 28565533. The next prime is 28565573. The reversal of 28565544 is 44556582.

28565544 is a modest number, since divided by 5544 gives 2856 as remainder.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 31984 + ... + 32864.

It is an arithmetic number, because the mean of its divisors is an integer number (1283310).

Almost surely, 2^28565544 is an apocalyptic number.

28565544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28565544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41065920).

28565544 is an abundant number, since it is smaller than the sum of its proper divisors (53566296).

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

28565544 is a wasteful number, since it uses less digits than its factorization.

28565544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1086 counting only the distinct ones).

The product of its digits is 192000, while the sum is 39.

The square root of 28565544 is about 5344.6743586490. The cubic root of 28565544 is about 305.6897192326.

The spelling of 28565544 in words is "twenty-eight million, five hundred sixty-five thousand, five hundred forty-four".