28544897 has 8 divisors (see below), whose sum is σ = 30780960. Its totient is φ = 26382240.

The previous prime is 28544891. The next prime is 28544917. The reversal of 28544897 is 79844582.

It is a happy number.

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 28544897 - 2¹⁶ = 28479361 is a prime.

It is a super-2 number, since 2×28544897² = 1629622289481218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28544891) 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, 17543 + ... + 19100.

It is an arithmetic number, because the mean of its divisors is an integer number (3847620).

Almost surely, 2^28544897 is an apocalyptic number.

It is an amenable number.

28544897 is a deficient number, since it is larger than the sum of its proper divisors (2236063).

28544897 is a wasteful number, since it uses less digits than its factorization.

28544897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36703.

The product of its digits is 645120, while the sum is 47.

The square root of 28544897 is about 5342.7424605721. The cubic root of 28544897 is about 305.6160512628.

The spelling of 28544897 in words is "twenty-eight million, five hundred forty-four thousand, eight hundred ninety-seven".