28830506 has 4 divisors (see below), whose sum is σ = 43245762. Its totient is φ = 14415252.

The previous prime is 28830493. The next prime is 28830509. The reversal of 28830506 is 60503882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60503882 = 2 ⋅30251941.

It can be written as a sum of positive squares in only one way, i.e., 21855625 + 6974881 = 4675^2 + 2641^2 .

It is not an unprimeable number, because it can be changed into a prime (28830509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7207625 + ... + 7207628.

Almost surely, 2^28830506 is an apocalyptic number.

28830506 is a deficient number, since it is larger than the sum of its proper divisors (14415256).

28830506 is a wasteful number, since it uses less digits than its factorization.

28830506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14415255.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28830506 is about 5369.4046224884. The cubic root of 28830506 is about 306.6319617836.

The spelling of 28830506 in words is "twenty-eight million, eight hundred thirty thousand, five hundred six".