28596321 has 30 divisors (see below), whose sum is σ = 46278870. Its totient is φ = 17589312.

The previous prime is 28596319. The next prime is 28596389. The reversal of 28596321 is 12369582.

It can be written as a sum of positive squares in 3 ways, for example, as 1347921 + 27248400 = 1161^2 + 5220^2 .

It is not a de Polignac number, because 28596321 - 2¹ = 28596319 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28596391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 12645 + ... + 14733.

It is an arithmetic number, because the mean of its divisors is an integer number (1542629).

Almost surely, 2^28596321 is an apocalyptic number.

It is an amenable number.

28596321 is a deficient number, since it is larger than the sum of its proper divisors (17682549).

28596321 is a wasteful number, since it uses less digits than its factorization.

28596321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127 (or 2105 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28596321 is about 5347.5528047884. The cubic root of 28596321 is about 305.7994649185.

It can be divided in two parts, 2859 and 6321, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 28596321 in words is "twenty-eight million, five hundred ninety-six thousand, three hundred twenty-one".