28234771 has 4 divisors (see below), whose sum is σ = 28268352. Its totient is φ = 28201192.

The previous prime is 28234763. The next prime is 28234793. The reversal of 28234771 is 17743282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17743282 = 2 ⋅8871641.

It is a cyclic number.

It is not a de Polignac number, because 28234771 - 2³ = 28234763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28234711) 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, 15496 + ... + 17221.

It is an arithmetic number, because the mean of its divisors is an integer number (7067088).

Almost surely, 2^28234771 is an apocalyptic number.

28234771 is a deficient number, since it is larger than the sum of its proper divisors (33581).

28234771 is an equidigital number, since it uses as much as digits as its factorization.

28234771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33580.

The product of its digits is 18816, while the sum is 34.

The square root of 28234771 is about 5313.6400894302. The cubic root of 28234771 is about 304.5052302491.

It can be divided in two parts, 282 and 34771, that added together give a palindrome (35053).

The spelling of 28234771 in words is "twenty-eight million, two hundred thirty-four thousand, seven hundred seventy-one".