28817071 has 4 divisors (see below), whose sum is σ = 29289544. Its totient is φ = 28344600.

The previous prime is 28817069. The next prime is 28817077. The reversal of 28817071 is 17071882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28817071 - 2¹ = 28817069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28817077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236145 + ... + 236266.

It is an arithmetic number, because the mean of its divisors is an integer number (7322386).

Almost surely, 2^28817071 is an apocalyptic number.

28817071 is a deficient number, since it is larger than the sum of its proper divisors (472473).

28817071 is an equidigital number, since it uses as much as digits as its factorization.

28817071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472472.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 28817071 is about 5368.1534068989. The cubic root of 28817071 is about 306.5843242745.

The spelling of 28817071 in words is "twenty-eight million, eight hundred seventeen thousand, seventy-one".