28050145 has 4 divisors (see below), whose sum is σ = 33660180. Its totient is φ = 22440112.

The previous prime is 28050083. The next prime is 28050149. The reversal of 28050145 is 54105082.

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 6185169 + 21864976 = 2487^2 + 4676^2 .

It is a cyclic number.

It is not a de Polignac number, because 28050145 - 2⁹ = 28049633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28050149) 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, 2805010 + ... + 2805019.

It is an arithmetic number, because the mean of its divisors is an integer number (8415045).

Almost surely, 2^28050145 is an apocalyptic number.

It is an amenable number.

28050145 is a deficient number, since it is larger than the sum of its proper divisors (5610035).

28050145 is an equidigital number, since it uses as much as digits as its factorization.

28050145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610034.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 28050145 is about 5296.2387597237. The cubic root of 28050145 is about 303.8400625979.

The spelling of 28050145 in words is "twenty-eight million, fifty thousand, one hundred forty-five".