28530116 has 6 divisors (see below), whose sum is σ = 49927710. Its totient is φ = 14265056.

The previous prime is 28530043. The next prime is 28530119. The reversal of 28530116 is 61103582.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 8099716 = 4520^2 + 2846^2 .

It is not an unprimeable number, because it can be changed into a prime (28530119) by changing a digit.

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 as a sum of consecutive naturals, namely, 3566261 + ... + 3566268.

It is an arithmetic number, because the mean of its divisors is an integer number (8321285).

Almost surely, 2^28530116 is an apocalyptic number.

It is an amenable number.

28530116 is a deficient number, since it is larger than the sum of its proper divisors (21397594).

28530116 is a wasteful number, since it uses less digits than its factorization.

28530116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132533 (or 7132531 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 28530116 is about 5341.3590031002. The cubic root of 28530116 is about 305.5632912103.

Adding to 28530116 its reverse (61103582), we get a palindrome (89633698).

The spelling of 28530116 in words is "twenty-eight million, five hundred thirty thousand, one hundred sixteen".