28531327 has 4 divisors (see below), whose sum is σ = 31125096. Its totient is φ = 25937560.

The previous prime is 28531297. The next prime is 28531337. The reversal of 28531327 is 72313582.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28531327 - 2²³ = 20142719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28531337) 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, 1296868 + ... + 1296889.

It is an arithmetic number, because the mean of its divisors is an integer number (7781274).

Almost surely, 2^28531327 is an apocalyptic number.

28531327 is a deficient number, since it is larger than the sum of its proper divisors (2593769).

28531327 is a wasteful number, since it uses less digits than its factorization.

28531327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593768.

The product of its digits is 10080, while the sum is 31.

The square root of 28531327 is about 5341.4723625607. The cubic root of 28531327 is about 305.5676145005.

The spelling of 28531327 in words is "twenty-eight million, five hundred thirty-one thousand, three hundred twenty-seven".