28532191 has 2 divisors, whose sum is σ = 28532192. Its totient is φ = 28532190.

The previous prime is 28532111. The next prime is 28532227. The reversal of 28532191 is 19123582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28532191 - 2¹⁷ = 28401119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28532111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14266095 + 14266096.

It is an arithmetic number, because the mean of its divisors is an integer number (14266096).

Almost surely, 2^28532191 is an apocalyptic number.

28532191 is a deficient number, since it is larger than the sum of its proper divisors (1).

28532191 is an equidigital number, since it uses as much as digits as its factorization.

28532191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 28532191 is about 5341.5532385253. The cubic root of 28532191 is about 305.5706989201.

The spelling of 28532191 in words is "twenty-eight million, five hundred thirty-two thousand, one hundred ninety-one".