28316785 has 8 divisors (see below), whose sum is σ = 38834496. Its totient is φ = 19417200.

The previous prime is 28316779. The next prime is 28316807. The reversal of 28316785 is 58761382.

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

It is not a de Polignac number, because 28316785 - 2¹³ = 28308593 is a prime.

It is a super-3 number, since 3×28316785³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404491 + ... + 404560.

It is an arithmetic number, because the mean of its divisors is an integer number (4854312).

Almost surely, 2^28316785 is an apocalyptic number.

It is an amenable number.

28316785 is a deficient number, since it is larger than the sum of its proper divisors (10517711).

28316785 is an equidigital number, since it uses as much as digits as its factorization.

28316785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809063.

The product of its digits is 80640, while the sum is 40.

The square root of 28316785 is about 5321.3518019391. The cubic root of 28316785 is about 304.7997790096.

The spelling of 28316785 in words is "twenty-eight million, three hundred sixteen thousand, seven hundred eighty-five".