28898 has 4 divisors (see below), whose sum is σ = 43350. Its totient is φ = 14448.

The previous prime is 28879. The next prime is 28901. The reversal of 28898 is 89882.

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., 16129 + 12769 = 127^2 + 113^2 .

It is a nialpdrome in base 14.

It is an unprimeable number.

28898 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7223 + ... + 7226.

2²⁸⁸⁹⁸ is an apocalyptic number.

28898 is a deficient number, since it is larger than the sum of its proper divisors (14452).

28898 is a wasteful number, since it uses less digits than its factorization.

28898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14451.

The product of its digits is 9216, while the sum is 35.

The square root of 28898 is about 169.9941175453. The cubic root of 28898 is about 30.6871056773.

It can be divided in two parts, 288 and 98, that multiplied together give a square (28224 = 168²).

The spelling of 28898 in words is "twenty-eight thousand, eight hundred ninety-eight".