28500506 has 8 divisors (see below), whose sum is σ = 42811284. Its totient is φ = 14230080.

The previous prime is 28500499. The next prime is 28500509. The reversal of 28500506 is 60500582.

It can be written as a sum of positive squares in 2 ways, for example, as 27615025 + 885481 = 5255^2 + 941^2 .

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

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28500509) 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, 8255 + ... + 11186.

Almost surely, 2^28500506 is an apocalyptic number.

28500506 is a deficient number, since it is larger than the sum of its proper divisors (14310778).

28500506 is a wasteful number, since it uses less digits than its factorization.

28500506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20176.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 28500506 is about 5338.5865170474. The cubic root of 28500506 is about 305.4575449301.

The spelling of 28500506 in words is "twenty-eight million, five hundred thousand, five hundred six".