28637056 has 64 divisors (see below), whose sum is σ = 67368960. Its totient is φ = 11865600.

The previous prime is 28637039. The next prime is 28637057. The reversal of 28637056 is 65073682.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28637057) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 27261 + ... + 28291.

It is an arithmetic number, because the mean of its divisors is an integer number (1052640).

Almost surely, 2^28637056 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 28637056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33684480).

28637056 is an abundant number, since it is smaller than the sum of its proper divisors (38731904).

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

28637056 is a wasteful number, since it uses less digits than its factorization.

28637056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 28637056 is about 5351.3602009209. The cubic root of 28637056 is about 305.9445981691.

The spelling of 28637056 in words is "twenty-eight million, six hundred thirty-seven thousand, fifty-six".