28265817 has 8 divisors (see below), whose sum is σ = 38706496. Its totient is φ = 18334512.

The previous prime is 28265803. The next prime is 28265821. The reversal of 28265817 is 71856282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28265817 - 2⁸ = 28265561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28265837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127213 + ... + 127434.

It is an arithmetic number, because the mean of its divisors is an integer number (4838312).

Almost surely, 2^28265817 is an apocalyptic number.

It is an amenable number.

28265817 is a deficient number, since it is larger than the sum of its proper divisors (10440679).

28265817 is a wasteful number, since it uses less digits than its factorization.

28265817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254687.

The product of its digits is 53760, while the sum is 39.

The square root of 28265817 is about 5316.5606363513. The cubic root of 28265817 is about 304.6167972541.

The spelling of 28265817 in words is "twenty-eight million, two hundred sixty-five thousand, eight hundred seventeen".