28436 has 6 divisors (see below), whose sum is σ = 49770.
Its totient is φ = 14216.
The previous prime is 28433. The next prime is 28439. The reversal of 28436 is 63482.
It can be divided in two parts, 28 and 436, that added together give a palindrome (464).
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (28433) and next prime (28439).
It can be written as a sum of positive squares in only one way, i.e., 19600 + 8836 = 140^2 + 94^2
It is a plaindrome in base 12.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28436.
It is not an unprimeable number, because it can be changed into a prime (28433) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3551 + ... + 3558.
It is an arithmetic number, because the mean of its divisors is an integer number (8295).
228436 is an apocalyptic number.
It is an amenable number.
28436 is a deficient number, since it is larger than the sum of its proper divisors (21334).
28436 is a wasteful number, since it uses less digits than its factorization.
28436 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7113 (or 7111 counting only the distinct ones).
The product of its digits is 1152, while the sum is 23.
The square root of 28436 is about 168.6297719859.
The cubic root of 28436 is about 30.5226920621.
The spelling of 28436 in words is "twenty-eight thousand, four hundred thirty-six".