28277320187 has 2 divisors, whose sum is σ = 28277320188. Its totient is φ = 28277320186.

The previous prime is 28277320177. The next prime is 28277320193. The reversal of 28277320187 is 78102377282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28277320187 - 2¹² = 28277316091 is a prime.

It is not a weakly prime, because it can be changed into another prime (28277320177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14138660093 + 14138660094.

It is an arithmetic number, because the mean of its divisors is an integer number (14138660094).

Almost surely, 2^28277320187 is an apocalyptic number.

28277320187 is a deficient number, since it is larger than the sum of its proper divisors (1).

28277320187 is an equidigital number, since it uses as much as digits as its factorization.

28277320187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 28277320187 in words is "twenty-eight billion, two hundred seventy-seven million, three hundred twenty thousand, one hundred eighty-seven".