28530105 has 8 divisors (see below), whose sum is σ = 45648192. Its totient is φ = 15216048.

The previous prime is 28530043. The next prime is 28530119. The reversal of 28530105 is 50103582.

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

It is not a de Polignac number, because 28530105 - 2¹⁸ = 28267961 is a prime.

It is a super-2 number, since 2×28530105² = 1627933782622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950989 + ... + 951018.

It is an arithmetic number, because the mean of its divisors is an integer number (5706024).

Almost surely, 2^28530105 is an apocalyptic number.

It is an amenable number.

28530105 is a deficient number, since it is larger than the sum of its proper divisors (17118087).

28530105 is a wasteful number, since it uses less digits than its factorization.

28530105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902015.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 28530105 is about 5341.3579733996. The cubic root of 28530105 is about 305.5632519396.

Adding to 28530105 its reverse (50103582), we get a palindrome (78633687).

The spelling of 28530105 in words is "twenty-eight million, five hundred thirty thousand, one hundred five".