28767787 has 2 divisors, whose sum is σ = 28767788. Its totient is φ = 28767786.

The previous prime is 28767769. The next prime is 28767821. The reversal of 28767787 is 78776782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28767787 - 2¹⁵ = 28735019 is a prime.

It is not a weakly prime, because it can be changed into another prime (28767727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14383893 + 14383894.

It is an arithmetic number, because the mean of its divisors is an integer number (14383894).

Almost surely, 2^28767787 is an apocalyptic number.

28767787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28767787 is an equidigital number, since it uses as much as digits as its factorization.

28767787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1843968, while the sum is 52.

The square root of 28767787 is about 5363.5610372214. The cubic root of 28767787 is about 306.4094473326.

The spelling of 28767787 in words is "twenty-eight million, seven hundred sixty-seven thousand, seven hundred eighty-seven".