28322045 has 8 divisors (see below), whose sum is σ = 34048824. Its totient is φ = 22616064.

The previous prime is 28322011. The next prime is 28322071. The reversal of 28322045 is 54022382.

It can be written as a sum of positive squares in 4 ways, for example, as 20693401 + 7628644 = 4549^2 + 2762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28322045 - 2¹⁸ = 28059901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2024 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (4256103).

Almost surely, 2^28322045 is an apocalyptic number.

It is an amenable number.

28322045 is a deficient number, since it is larger than the sum of its proper divisors (5726779).

28322045 is an equidigital number, since it uses as much as digits as its factorization.

28322045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10399.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28322045 is about 5321.8460143074. The cubic root of 28322045 is about 304.8186505914.

It can be divided in two parts, 283220 and 45, that multiplied together give a square (12744900 = 3570²).

The spelling of 28322045 in words is "twenty-eight million, three hundred twenty-two thousand, forty-five".