28660837 has 2 divisors, whose sum is σ = 28660838. Its totient is φ = 28660836.

The previous prime is 28660817. The next prime is 28660867. The reversal of 28660837 is 73806682.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26894596 + 1766241 = 5186^2 + 1329^2 .

It is a cyclic number.

It is not a de Polignac number, because 28660837 - 2¹⁵ = 28628069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28660837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28660817) 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, 14330418 + 14330419.

It is an arithmetic number, because the mean of its divisors is an integer number (14330419).

Almost surely, 2^28660837 is an apocalyptic number.

It is an amenable number.

28660837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28660837 is an equidigital number, since it uses as much as digits as its factorization.

28660837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28660837 is about 5353.5816982652. The cubic root of 28660837 is about 306.0292630109.

The spelling of 28660837 in words is "twenty-eight million, six hundred sixty thousand, eight hundred thirty-seven".