28971065 has 8 divisors (see below), whose sum is σ = 35354880. Its totient is φ = 22783792.

The previous prime is 28971049. The next prime is 28971097. The reversal of 28971065 is 56017982.

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 28971065 - 2⁴ = 28971049 is a prime.

It is an unprimeable number.

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, 48809 + ... + 49398.

It is an arithmetic number, because the mean of its divisors is an integer number (4419360).

Almost surely, 2^28971065 is an apocalyptic number.

It is an amenable number.

28971065 is a deficient number, since it is larger than the sum of its proper divisors (6383815).

28971065 is an equidigital number, since it uses as much as digits as its factorization.

28971065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98271.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28971065 is about 5382.4775893635. The cubic root of 28971065 is about 307.1294675458.

The spelling of 28971065 in words is "twenty-eight million, nine hundred seventy-one thousand, sixty-five".