28892081 has 2 divisors, whose sum is σ = 28892082. Its totient is φ = 28892080.

The previous prime is 28892069. The next prime is 28892107. The reversal of 28892081 is 18029882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25847056 + 3045025 = 5084^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 28892081 - 2¹⁴ = 28875697 is a prime.

It is a super-2 number, since 2×28892081² = 1669504689021122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28892011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14446040 + 14446041.

It is an arithmetic number, because the mean of its divisors is an integer number (14446041).

Almost surely, 2^28892081 is an apocalyptic number.

It is an amenable number.

28892081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28892081 is an equidigital number, since it uses as much as digits as its factorization.

28892081 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 28892081 is about 5375.1354401540. The cubic root of 28892081 is about 306.8501038368.

The spelling of 28892081 in words is "twenty-eight million, eight hundred ninety-two thousand, eighty-one".