28730271 has 8 divisors (see below), whose sum is σ = 39628080. Its totient is φ = 18492992.

The previous prime is 28730267. The next prime is 28730281. The reversal of 28730271 is 17203782.

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 28730271 - 2² = 28730267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28730231) 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, 165030 + ... + 165203.

It is an arithmetic number, because the mean of its divisors is an integer number (4953510).

Almost surely, 2^28730271 is an apocalyptic number.

28730271 is a deficient number, since it is larger than the sum of its proper divisors (10897809).

28730271 is a wasteful number, since it uses less digits than its factorization.

28730271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330265.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28730271 is about 5360.0625929181. The cubic root of 28730271 is about 306.2761934559.

The spelling of 28730271 in words is "twenty-eight million, seven hundred thirty thousand, two hundred seventy-one".