28785929 has 2 divisors, whose sum is σ = 28785930. Its totient is φ = 28785928.

The previous prime is 28785917. The next prime is 28785979. The reversal of 28785929 is 92958782.

It is an a-pointer prime, because the next prime (28785979) can be obtained adding 28785929 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28783225 + 2704 = 5365^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 28785929 - 2²⁴ = 12008713 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28785979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14392964 + 14392965.

It is an arithmetic number, because the mean of its divisors is an integer number (14392965).

Almost surely, 2^28785929 is an apocalyptic number.

It is an amenable number.

28785929 is a deficient number, since it is larger than the sum of its proper divisors (1).

28785929 is an equidigital number, since it uses as much as digits as its factorization.

28785929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 28785929 is about 5365.2519978096. The cubic root of 28785929 is about 306.4738447326.

The spelling of 28785929 in words is "twenty-eight million, seven hundred eighty-five thousand, nine hundred twenty-nine".