28820801 has 2 divisors, whose sum is σ = 28820802. Its totient is φ = 28820800.

The previous prime is 28820791. The next prime is 28820807. The reversal of 28820801 is 10802882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24760576 + 4060225 = 4976^2 + 2015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28820801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28820807) 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, 14410400 + 14410401.

It is an arithmetic number, because the mean of its divisors is an integer number (14410401).

Almost surely, 2^28820801 is an apocalyptic number.

It is an amenable number.

28820801 is a deficient number, since it is larger than the sum of its proper divisors (1).

28820801 is an equidigital number, since it uses as much as digits as its factorization.

28820801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 28820801 is about 5368.5008149389. The cubic root of 28820801 is about 306.5975515058.

The spelling of 28820801 in words is "twenty-eight million, eight hundred twenty thousand, eight hundred one".