28094530 has 8 divisors (see below), whose sum is σ = 50570172. Its totient is φ = 11237808.

The previous prime is 28094519. The next prime is 28094531. The reversal of 28094530 is 3549082.

It can be written as a sum of positive squares in 2 ways, for example, as 28079401 + 15129 = 5299^2 + 123^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28094492 and 28094501.

It is not an unprimeable number, because it can be changed into a prime (28094531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404717 + ... + 1404736.

Almost surely, 2^28094530 is an apocalyptic number.

28094530 is a deficient number, since it is larger than the sum of its proper divisors (22475642).

28094530 is a wasteful number, since it uses less digits than its factorization.

28094530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809460.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28094530 is about 5300.4273412622. The cubic root of 28094530 is about 304.0002380538. Note that the first 3 decimals are identical.

The spelling of 28094530 in words is "twenty-eight million, ninety-four thousand, five hundred thirty".