28888664 has 48 divisors (see below), whose sum is σ = 65379600. Its totient is φ = 11721024.

The previous prime is 28888663. The next prime is 28888681. The reversal of 28888664 is 46688882.

28888664 is a modest number, since divided by 8664 gives 2888 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28888663) 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 11 ways as a sum of consecutive naturals, for example, 19502 + ... + 20930.

It is an arithmetic number, because the mean of its divisors is an integer number (1362075).

Almost surely, 2^28888664 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 28888664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32689800).

28888664 is an abundant number, since it is smaller than the sum of its proper divisors (36490936).

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

28888664 is a wasteful number, since it uses less digits than its factorization.

28888664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480 (or 1457 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 50.

The square root of 28888664 is about 5374.8175782998. The cubic root of 28888664 is about 306.8380065411.

The spelling of 28888664 in words is "twenty-eight million, eight hundred eighty-eight thousand, six hundred sixty-four".