28930171 has 4 divisors (see below), whose sum is σ = 29151144. Its totient is φ = 28709200.

The previous prime is 28930169. The next prime is 28930193. The reversal of 28930171 is 17103982.

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 28930171 - 2¹ = 28930169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28930151) 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, 110290 + ... + 110551.

It is an arithmetic number, because the mean of its divisors is an integer number (7287786).

Almost surely, 2^28930171 is an apocalyptic number.

28930171 is a deficient number, since it is larger than the sum of its proper divisors (220973).

28930171 is a wasteful number, since it uses less digits than its factorization.

28930171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220972.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 28930171 is about 5378.6774396686. The cubic root of 28930171 is about 306.9848903427.

The spelling of 28930171 in words is "twenty-eight million, nine hundred thirty thousand, one hundred seventy-one".