28966281 has 8 divisors (see below), whose sum is σ = 38663040. Its totient is φ = 19290192.

The previous prime is 28966247. The next prime is 28966297. The reversal of 28966281 is 18266982.

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

It is not a de Polignac number, because 28966281 - 2¹¹ = 28964233 is a prime.

It is a super-2 number, since 2×28966281² = 1678090869941922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28961281) 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, 1530 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (4832880).

Almost surely, 2^28966281 is an apocalyptic number.

It is an amenable number.

28966281 is a deficient number, since it is larger than the sum of its proper divisors (9696759).

28966281 is a wasteful number, since it uses less digits than its factorization.

28966281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10335.

The product of its digits is 82944, while the sum is 42.

The square root of 28966281 is about 5382.0331660071. The cubic root of 28966281 is about 307.1125611571.

The spelling of 28966281 in words is "twenty-eight million, nine hundred sixty-six thousand, two hundred eighty-one".