28982081 has 2 divisors, whose sum is σ = 28982082. Its totient is φ = 28982080.

The previous prime is 28982071. The next prime is 28982101. The reversal of 28982081 is 18028982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 839056 = 5305^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 28982081 - 2⁶ = 28982017 is a prime.

It is a super-2 number, since 2×28982081² = 1679922038181122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28982021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14491040 + 14491041.

It is an arithmetic number, because the mean of its divisors is an integer number (14491041).

Almost surely, 2^28982081 is an apocalyptic number.

It is an amenable number.

28982081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28982081 is an equidigital number, since it uses as much as digits as its factorization.

28982081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 28982081 is about 5383.5008126683. The cubic root of 28982081 is about 307.1683903984.

The spelling of 28982081 in words is "twenty-eight million, nine hundred eighty-two thousand, eighty-one".