28767191 has 2 divisors, whose sum is σ = 28767192. Its totient is φ = 28767190.

The previous prime is 28767169. The next prime is 28767251. The reversal of 28767191 is 19176782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28767191 - 2⁶ = 28767127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28760191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14383595 + 14383596.

It is an arithmetic number, because the mean of its divisors is an integer number (14383596).

Almost surely, 2^28767191 is an apocalyptic number.

28767191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28767191 is an equidigital number, since it uses as much as digits as its factorization.

28767191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 28767191 is about 5363.5054768314. The cubic root of 28767191 is about 306.4073312934.

The spelling of 28767191 in words is "twenty-eight million, seven hundred sixty-seven thousand, one hundred ninety-one".