28605588 has 48 divisors (see below), whose sum is σ = 74794944. Its totient is φ = 8432640.

The previous prime is 28605581. The next prime is 28605589. The reversal of 28605588 is 88550682.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28605581) 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 15 ways as a sum of consecutive naturals, for example, 1956 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (1558228).

Almost surely, 2^28605588 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 28605588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37397472).

28605588 is an abundant number, since it is smaller than the sum of its proper divisors (46189356).

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

28605588 is a wasteful number, since it uses less digits than its factorization.

28605588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912 (or 5910 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 28605588 is about 5348.4192057093. The cubic root of 28605588 is about 305.8324940808.

It can be divided in two parts, 2860 and 5588, that added together give a palindrome (8448).

The spelling of 28605588 in words is "twenty-eight million, six hundred five thousand, five hundred eighty-eight".