28050311 has 4 divisors (see below), whose sum is σ = 28525800. Its totient is φ = 27574824.

The previous prime is 28050307. The next prime is 28050313. The reversal of 28050311 is 11305082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11305082 = 2 ⋅5652541.

It is a cyclic number.

It is not a de Polignac number, because 28050311 - 2² = 28050307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28050313) 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, 237656 + ... + 237773.

It is an arithmetic number, because the mean of its divisors is an integer number (7131450).

Almost surely, 2^28050311 is an apocalyptic number.

28050311 is a deficient number, since it is larger than the sum of its proper divisors (475489).

28050311 is an equidigital number, since it uses as much as digits as its factorization.

28050311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475488.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 28050311 is about 5296.2544311995. The cubic root of 28050311 is about 303.8406619692.

Adding to 28050311 its reverse (11305082), we get a palindrome (39355393).

The spelling of 28050311 in words is "twenty-eight million, fifty thousand, three hundred eleven".