28084897 has 4 divisors (see below), whose sum is σ = 28682496. Its totient is φ = 27487300.

The previous prime is 28084883. The next prime is 28084937. The reversal of 28084897 is 79848082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28084897 - 2⁷ = 28084769 is a prime.

It is a super-2 number, since 2×28084897² = 1577522879001218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28084807) 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 3 ways as a sum of consecutive naturals, for example, 298729 + ... + 298822.

It is an arithmetic number, because the mean of its divisors is an integer number (7170624).

Almost surely, 2^28084897 is an apocalyptic number.

It is an amenable number.

28084897 is a deficient number, since it is larger than the sum of its proper divisors (597599).

28084897 is an equidigital number, since it uses as much as digits as its factorization.

28084897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597598.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 28084897 is about 5299.5185630395. The cubic root of 28084897 is about 303.9654890706.

The spelling of 28084897 in words is "twenty-eight million, eighty-four thousand, eight hundred ninety-seven".