28763291 has 2 divisors, whose sum is σ = 28763292. Its totient is φ = 28763290.

The previous prime is 28763279. The next prime is 28763299. The reversal of 28763291 is 19236782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28763291 - 2⁶ = 28763227 is a prime.

It is not a weakly prime, because it can be changed into another prime (28763299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14381645 + 14381646.

It is an arithmetic number, because the mean of its divisors is an integer number (14381646).

Almost surely, 2^28763291 is an apocalyptic number.

28763291 is a deficient number, since it is larger than the sum of its proper divisors (1).

28763291 is an equidigital number, since it uses as much as digits as its factorization.

28763291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 28763291 is about 5363.1418963141. The cubic root of 28763291 is about 306.3934840070.

The spelling of 28763291 in words is "twenty-eight million, seven hundred sixty-three thousand, two hundred ninety-one".