28105153 has 4 divisors (see below), whose sum is σ = 28147588. Its totient is φ = 28062720.

The previous prime is 28105151. The next prime is 28105157. The reversal of 28105153 is 35150182.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2582449 + 25522704 = 1607^2 + 5052^2 .

It is a cyclic number.

It is not a de Polignac number, because 28105153 - 2¹ = 28105151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28105151) 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 in 3 ways as a sum of consecutive naturals, for example, 20208 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (7036897).

Almost surely, 2^28105153 is an apocalyptic number.

It is an amenable number.

28105153 is a deficient number, since it is larger than the sum of its proper divisors (42435).

28105153 is an equidigital number, since it uses as much as digits as its factorization.

28105153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42434.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 28105153 is about 5301.4293355660. The cubic root of 28105153 is about 304.0385490416.

The spelling of 28105153 in words is "twenty-eight million, one hundred five thousand, one hundred fifty-three".