28150289 has 4 divisors (see below), whose sum is σ = 28183920. Its totient is φ = 28116660.

The previous prime is 28150277. The next prime is 28150327. The reversal of 28150289 is 98205182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98205182 = 2 ⋅49102591.

It is a cyclic number.

It is not a de Polignac number, because 28150289 - 2⁸ = 28150033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28150259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15527 + ... + 17244.

It is an arithmetic number, because the mean of its divisors is an integer number (7045980).

Almost surely, 2^28150289 is an apocalyptic number.

It is an amenable number.

28150289 is a deficient number, since it is larger than the sum of its proper divisors (33631).

28150289 is an equidigital number, since it uses as much as digits as its factorization.

28150289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33630.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28150289 is about 5305.6845929625. The cubic root of 28150289 is about 304.2012208028.

The spelling of 28150289 in words is "twenty-eight million, one hundred fifty thousand, two hundred eighty-nine".