28322029 has 4 divisors (see below), whose sum is σ = 28710076. Its totient is φ = 27933984.

The previous prime is 28322011. The next prime is 28322071. The reversal of 28322029 is 92022382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92022382 = 2 ⋅46011191.

It can be written as a sum of positive squares in 2 ways, for example, as 23785129 + 4536900 = 4877^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 28322029 - 2¹¹ = 28319981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28321988 and 28322006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28322429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193914 + ... + 194059.

It is an arithmetic number, because the mean of its divisors is an integer number (7177519).

Almost surely, 2^28322029 is an apocalyptic number.

It is an amenable number.

28322029 is a deficient number, since it is larger than the sum of its proper divisors (388047).

28322029 is an equidigital number, since it uses as much as digits as its factorization.

28322029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388046.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28322029 is about 5321.8445110694. The cubic root of 28322029 is about 304.8185931909.

The spelling of 28322029 in words is "twenty-eight million, three hundred twenty-two thousand, twenty-nine".