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BaseRepresentation
bin110111000011…
…1010000100000
32000022112010010
41232013100200
524342144233
62510404520
7500232114
oct156072040
960275103
1028865568
1115326146
129800740
135c98824
143b95744
152802b63
hex1b87420

28865568 has 24 divisors (see below), whose sum is σ = 75772368. Its totient is φ = 9621824.

The previous prime is 28865563. The next prime is 28865581. The reversal of 28865568 is 86556882.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (28865563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150246 + ... + 150437.

It is an arithmetic number, because the mean of its divisors is an integer number (3157182).

Almost surely, 228865568 is an apocalyptic number.

It is an amenable number.

28865568 is an abundant number, since it is smaller than the sum of its proper divisors (46906800).

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

28865568 is a wasteful number, since it uses less digits than its factorization.

28865568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300696 (or 300688 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 28865568 is about 5372.6686106627. The cubic root of 28865568 is about 306.7562141350.

It can be divided in two parts, 288 and 65568, that added together give a palindrome (65856).

The spelling of 28865568 in words is "twenty-eight million, eight hundred sixty-five thousand, five hundred sixty-eight".