28275829 has 2 divisors, whose sum is σ = 28275830. Its totient is φ = 28275828.

The previous prime is 28275823. The next prime is 28275833. The reversal of 28275829 is 92857282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28068804 + 207025 = 5298^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 28275829 - 2¹³ = 28267637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28275823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137914 + 14137915.

It is an arithmetic number, because the mean of its divisors is an integer number (14137915).

Almost surely, 2^28275829 is an apocalyptic number.

It is an amenable number.

28275829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28275829 is an equidigital number, since it uses as much as digits as its factorization.

28275829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 28275829 is about 5317.5021391627. The cubic root of 28275829 is about 304.6527589879.

The spelling of 28275829 in words is "twenty-eight million, two hundred seventy-five thousand, eight hundred twenty-nine".