28064453 has 4 divisors (see below), whose sum is σ = 28524588. Its totient is φ = 27604320.

The previous prime is 28064447. The next prime is 28064461. The reversal of 28064453 is 35446082.

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 8862529 + 19201924 = 2977^2 + 4382^2 .

It is a cyclic number.

It is not a de Polignac number, because 28064453 - 2⁴ = 28064437 is a prime.

It is a super-2 number, since 2×28064453² = 1575227044378418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28064473) 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, 229976 + ... + 230097.

It is an arithmetic number, because the mean of its divisors is an integer number (7131147).

Almost surely, 2^28064453 is an apocalyptic number.

It is an amenable number.

28064453 is a deficient number, since it is larger than the sum of its proper divisors (460135).

28064453 is an equidigital number, since it uses as much as digits as its factorization.

28064453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460134.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28064453 is about 5297.5893574342. The cubic root of 28064453 is about 303.8917153868.

The spelling of 28064453 in words is "twenty-eight million, sixty-four thousand, four hundred fifty-three".