28310129 has 4 divisors (see below), whose sum is σ = 28602084. Its totient is φ = 28018176.

The previous prime is 28310123. The next prime is 28310137. The reversal of 28310129 is 92101382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92101382 = 2 ⋅46050691.

It can be written as a sum of positive squares in 2 ways, for example, as 7011904 + 21298225 = 2648^2 + 4615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28310129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28310098 and 28310107.

It is not an unprimeable number, because it can be changed into a prime (28310123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145832 + ... + 146025.

It is an arithmetic number, because the mean of its divisors is an integer number (7150521).

Almost surely, 2^28310129 is an apocalyptic number.

It is an amenable number.

28310129 is a deficient number, since it is larger than the sum of its proper divisors (291955).

28310129 is an equidigital number, since it uses as much as digits as its factorization.

28310129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291954.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 28310129 is about 5320.7263601881. The cubic root of 28310129 is about 304.7758955743.

The spelling of 28310129 in words is "twenty-eight million, three hundred ten thousand, one hundred twenty-nine".