28329757 has 2 divisors, whose sum is σ = 28329758. Its totient is φ = 28329756.

The previous prime is 28329689. The next prime is 28329787. The reversal of 28329757 is 75792382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17214201 + 11115556 = 4149^2 + 3334^2 .

It is a cyclic number.

It is not a de Polignac number, because 28329757 - 2²³ = 19941149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28329787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14164878 + 14164879.

It is an arithmetic number, because the mean of its divisors is an integer number (14164879).

Almost surely, 2^28329757 is an apocalyptic number.

It is an amenable number.

28329757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28329757 is an equidigital number, since it uses as much as digits as its factorization.

28329757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 28329757 is about 5322.5705256013. The cubic root of 28329757 is about 304.8463151203.

The spelling of 28329757 in words is "twenty-eight million, three hundred twenty-nine thousand, seven hundred fifty-seven".