28827311 has 4 divisors (see below), whose sum is σ = 29174712. Its totient is φ = 28479912.

The previous prime is 28827307. The next prime is 28827347. The reversal of 28827311 is 11372882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11372882 = 2 ⋅5686441.

It is a cyclic number.

It is not a de Polignac number, because 28827311 - 2² = 28827307 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 (28827371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173576 + ... + 173741.

It is an arithmetic number, because the mean of its divisors is an integer number (7293678).

Almost surely, 2^28827311 is an apocalyptic number.

28827311 is a deficient number, since it is larger than the sum of its proper divisors (347401).

28827311 is an equidigital number, since it uses as much as digits as its factorization.

28827311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347400.

The product of its digits is 5376, while the sum is 32.

The square root of 28827311 is about 5369.1070952254. The cubic root of 28827311 is about 306.6206343687.

The spelling of 28827311 in words is "twenty-eight million, eight hundred twenty-seven thousand, three hundred eleven".