28444453 has 8 divisors (see below), whose sum is σ = 30156800. Its totient is φ = 26781840.

The previous prime is 28444433. The next prime is 28444459. The reversal of 28444453 is 35444482.

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

It is a cyclic number.

It is not a de Polignac number, because 28444453 - 2⁵ = 28444421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11253 + ... + 13546.

It is an arithmetic number, because the mean of its divisors is an integer number (3769600).

Almost surely, 2^28444453 is an apocalyptic number.

It is an amenable number.

28444453 is a deficient number, since it is larger than the sum of its proper divisors (1712347).

28444453 is a wasteful number, since it uses less digits than its factorization.

28444453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24867.

The product of its digits is 61440, while the sum is 34.

The square root of 28444453 is about 5333.3341354166. The cubic root of 28444453 is about 305.2571619528.

The spelling of 28444453 in words is "twenty-eight million, four hundred forty-four thousand, four hundred fifty-three".