28825664 has 84 divisors (see below), whose sum is σ = 68616576. Its totient is φ = 11764224.

The previous prime is 28825663. The next prime is 28825669. The reversal of 28825664 is 46652882.

It is not an unprimeable number, because it can be changed into a prime (28825661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613289 + ... + 613335.

It is an arithmetic number, because the mean of its divisors is an integer number (816864).

Almost surely, 2^28825664 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 28825664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34308288).

28825664 is an abundant number, since it is smaller than the sum of its proper divisors (39790912).

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

28825664 is an equidigital number, since it uses as much as digits as its factorization.

28825664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 93 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 28825664 is about 5368.9537155762. The cubic root of 28825664 is about 306.6147948392.

It can be divided in two parts, 288 and 25664, that added together give a palindrome (25952).

The spelling of 28825664 in words is "twenty-eight million, eight hundred twenty-five thousand, six hundred sixty-four".