28344097 has 4 divisors (see below), whose sum is σ = 28662660. Its totient is φ = 28025536.

The previous prime is 28344091. The next prime is 28344101. The reversal of 28344097 is 79044382.

It is a happy number.

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 9759376 + 18584721 = 3124^2 + 4311^2 .

It is a cyclic number.

It is not a de Polignac number, because 28344097 - 2³ = 28344089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28344091) 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, 159148 + ... + 159325.

It is an arithmetic number, because the mean of its divisors is an integer number (7165665).

Almost surely, 2^28344097 is an apocalyptic number.

It is an amenable number.

28344097 is a deficient number, since it is larger than the sum of its proper divisors (318563).

28344097 is an equidigital number, since it uses as much as digits as its factorization.

28344097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318562.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28344097 is about 5323.9174486463. The cubic root of 28344097 is about 304.8977423031.

The spelling of 28344097 in words is "twenty-eight million, three hundred forty-four thousand, ninety-seven".