28128453 has 8 divisors (see below), whose sum is σ = 37570848. Its totient is φ = 18719184.

The previous prime is 28128449. The next prime is 28128467. The reversal of 28128453 is 35482182.

28128453 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28128453 - 2² = 28128449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128553) 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 7 ways as a sum of consecutive naturals, for example, 6226 + ... + 9747.

It is an arithmetic number, because the mean of its divisors is an integer number (4696356).

Almost surely, 2^28128453 is an apocalyptic number.

It is an amenable number.

28128453 is a deficient number, since it is larger than the sum of its proper divisors (9442395).

28128453 is a wasteful number, since it uses less digits than its factorization.

28128453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16563.

The product of its digits is 15360, while the sum is 33.

The square root of 28128453 is about 5303.6264008695. The cubic root of 28128453 is about 304.1225448063.

The spelling of 28128453 in words is "twenty-eight million, one hundred twenty-eight thousand, four hundred fifty-three".