28265888 has 48 divisors (see below), whose sum is σ = 63975744. Its totient is φ = 12042240.

The previous prime is 28265879. The next prime is 28265903. The reversal of 28265888 is 88856282.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 57323 + ... + 57813.

It is an arithmetic number, because the mean of its divisors is an integer number (1332828).

Almost surely, 2^28265888 is an apocalyptic number.

28265888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28265888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31987872).

28265888 is an abundant number, since it is smaller than the sum of its proper divisors (35709856).

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

28265888 is a wasteful number, since it uses less digits than its factorization.

28265888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 757 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 28265888 is about 5316.5673135962. The cubic root of 28265888 is about 304.6170523063.

The spelling of 28265888 in words is "twenty-eight million, two hundred sixty-five thousand, eight hundred eighty-eight".