28849453 has 4 divisors (see below), whose sum is σ = 28862460. Its totient is φ = 28836448.

The previous prime is 28849441. The next prime is 28849507. The reversal of 28849453 is 35494882.

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 13380964 + 15468489 = 3658^2 + 3933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28849453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28849433) 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, 2248 + ... + 7921.

It is an arithmetic number, because the mean of its divisors is an integer number (7215615).

Almost surely, 2^28849453 is an apocalyptic number.

It is an amenable number.

28849453 is a deficient number, since it is larger than the sum of its proper divisors (13007).

28849453 is a wasteful number, since it uses less digits than its factorization.

28849453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006.

The product of its digits is 276480, while the sum is 43.

The square root of 28849453 is about 5371.1686810228. The cubic root of 28849453 is about 306.6991184677.

The spelling of 28849453 in words is "twenty-eight million, eight hundred forty-nine thousand, four hundred fifty-three".