28866481 has 16 divisors (see below), whose sum is σ = 34065280. Its totient is φ = 23950080.

The previous prime is 28866473. The next prime is 28866499. The reversal of 28866481 is 18466882.

It is not a de Polignac number, because 28866481 - 2³ = 28866473 is a prime.

It is a super-2 number, since 2×28866481² = 1666547450646722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28866881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28105 + ... + 29113.

It is an arithmetic number, because the mean of its divisors is an integer number (2129080).

Almost surely, 2^28866481 is an apocalyptic number.

It is an amenable number.

28866481 is a deficient number, since it is larger than the sum of its proper divisors (5198799).

28866481 is a wasteful number, since it uses less digits than its factorization.

28866481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 147456, while the sum is 43.

The square root of 28866481 is about 5372.7535770776. The cubic root of 28866481 is about 306.7594482705.

The spelling of 28866481 in words is "twenty-eight million, eight hundred sixty-six thousand, four hundred eighty-one".