28630187 has 2 divisors, whose sum is σ = 28630188. Its totient is φ = 28630186.

The previous prime is 28630183. The next prime is 28630211. The reversal of 28630187 is 78103682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28630187 - 2² = 28630183 is a prime.

It is not a weakly prime, because it can be changed into another prime (28630183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315093 + 14315094.

It is an arithmetic number, because the mean of its divisors is an integer number (14315094).

Almost surely, 2^28630187 is an apocalyptic number.

28630187 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630187 is an equidigital number, since it uses as much as digits as its factorization.

28630187 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 35.

The square root of 28630187 is about 5350.7183629864. The cubic root of 28630187 is about 305.9201345104.

The spelling of 28630187 in words is "twenty-eight million, six hundred thirty thousand, one hundred eighty-seven".