28306807 has 2 divisors, whose sum is σ = 28306808. Its totient is φ = 28306806.

The previous prime is 28306799. The next prime is 28306841. The reversal of 28306807 is 70860382.

It is a happy number.

It is an a-pointer prime, because the next prime (28306841) can be obtained adding 28306807 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28306807 - 2³ = 28306799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28306847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153403 + 14153404.

It is an arithmetic number, because the mean of its divisors is an integer number (14153404).

Almost surely, 2^28306807 is an apocalyptic number.

28306807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28306807 is an equidigital number, since it uses as much as digits as its factorization.

28306807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28306807 is about 5320.4141756070. The cubic root of 28306807 is about 304.7639739857.

The spelling of 28306807 in words is "twenty-eight million, three hundred six thousand, eight hundred seven".