28802 has 4 divisors (see below), whose sum is σ = 43206.
Its totient is φ = 14400.
The previous prime is 28793. The next prime is 28807. The reversal of 28802 is 20882.
28802 = T118 + T119 + ... +
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 14641 + 14161 = 121^2 + 119^2
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28802.
It is not an unprimeable number, because it can be changed into a prime (28807) by changing a digit.
28802 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7199 + ... + 7202.
228802 is an apocalyptic number.
28802 is a deficient number, since it is larger than the sum of its proper divisors (14404).
28802 is a wasteful number, since it uses less digits than its factorization.
28802 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 14403.
The product of its (nonzero) digits is 256, while the sum is 20.
The square root of 28802 is about 169.7115199390.
The cubic root of 28802 is about 30.6530868251.
Subtracting from 28802 its sum of digits (20), we obtain a palindrome (28782).
It can be divided in two parts, 2880 and 2, that added together give a palindrome (2882).
The spelling of 28802 in words is "twenty-eight thousand, eight hundred two".