28316487 has 4 divisors (see below), whose sum is σ = 37755320. Its totient is φ = 18877656.

The previous prime is 28316471. The next prime is 28316501. The reversal of 28316487 is 78461382.

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

It is not a de Polignac number, because 28316487 - 2⁴ = 28316471 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 (28316417) 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 3 ways as a sum of consecutive naturals, for example, 4719412 + ... + 4719417.

It is an arithmetic number, because the mean of its divisors is an integer number (9438830).

Almost surely, 2^28316487 is an apocalyptic number.

28316487 is a deficient number, since it is larger than the sum of its proper divisors (9438833).

28316487 is an equidigital number, since it uses as much as digits as its factorization.

28316487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9438832.

The product of its digits is 64512, while the sum is 39.

The square root of 28316487 is about 5321.3238014614. The cubic root of 28316487 is about 304.7987097892.

The spelling of 28316487 in words is "twenty-eight million, three hundred sixteen thousand, four hundred eighty-seven".