28094508 has 72 divisors (see below), whose sum is σ = 77143248. Its totient is φ = 8569728.

The previous prime is 28094503. The next prime is 28094509. The reversal of 28094508 is 80549082.

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

It is not an unprimeable number, because it can be changed into a prime (28094503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80791 + ... + 81137.

It is an arithmetic number, because the mean of its divisors is an integer number (1071434).

Almost surely, 2^28094508 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 28094508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38571624).

28094508 is an abundant number, since it is smaller than the sum of its proper divisors (49048740).

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

28094508 is a wasteful number, since it uses less digits than its factorization.

28094508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28094508 is about 5300.4252659574. The cubic root of 28094508 is about 304.0001587026. Note that the first 3 decimals are identical.

The spelling of 28094508 in words is "twenty-eight million, ninety-four thousand, five hundred eight".