28105488 has 160 divisors (see below), whose sum is σ = 88387200. Its totient is φ = 8515584.

The previous prime is 28105487. The next prime is 28105501. The reversal of 28105488 is 88450182.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28105487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315748 + ... + 315836.

It is an arithmetic number, because the mean of its divisors is an integer number (552420).

Almost surely, 2^28105488 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 28105488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44193600).

28105488 is an abundant number, since it is smaller than the sum of its proper divisors (60281712).

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

28105488 is a wasteful number, since it uses less digits than its factorization.

28105488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28105488 is about 5301.4609307247. The cubic root of 28105488 is about 304.0397570349.

The spelling of 28105488 in words is "twenty-eight million, one hundred five thousand, four hundred eighty-eight".