28648187 has 2 divisors, whose sum is σ = 28648188. Its totient is φ = 28648186.

The previous prime is 28648183. The next prime is 28648199. The reversal of 28648187 is 78184682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28648187 - 2² = 28648183 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28648183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14324093 + 14324094.

It is an arithmetic number, because the mean of its divisors is an integer number (14324094).

Almost surely, 2^28648187 is an apocalyptic number.

28648187 is a deficient number, since it is larger than the sum of its proper divisors (1).

28648187 is an equidigital number, since it uses as much as digits as its factorization.

28648187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 44.

The square root of 28648187 is about 5352.4001158359. The cubic root of 28648187 is about 305.9842324596.

The spelling of 28648187 in words is "twenty-eight million, six hundred forty-eight thousand, one hundred eighty-seven".