28298849 has 4 divisors (see below), whose sum is σ = 28322964. Its totient is φ = 28274736.

The previous prime is 28298843. The next prime is 28298861. The reversal of 28298849 is 94889282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23348224 + 4950625 = 4832^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 28298849 - 2⁴ = 28298833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28298797 and 28298806.

It is not an unprimeable number, because it can be changed into a prime (28298843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10202 + ... + 12675.

It is an arithmetic number, because the mean of its divisors is an integer number (7080741).

Almost surely, 2^28298849 is an apocalyptic number.

It is an amenable number.

28298849 is a deficient number, since it is larger than the sum of its proper divisors (24115).

28298849 is a wasteful number, since it uses less digits than its factorization.

28298849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24114.

The product of its digits is 663552, while the sum is 50.

The square root of 28298849 is about 5319.6662489295. Note that the first 3 decimals coincide. The cubic root of 28298849 is about 304.7354114917.

The spelling of 28298849 in words is "twenty-eight million, two hundred ninety-eight thousand, eight hundred forty-nine".