28328785 has 8 divisors (see below), whose sum is σ = 34312896. Its totient is φ = 22450800.

The previous prime is 28328779. The next prime is 28328809. The reversal of 28328785 is 58782382.

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

It is not a de Polignac number, because 28328785 - 2¹¹ = 28326737 is a prime.

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, 25941 + ... + 27010.

It is an arithmetic number, because the mean of its divisors is an integer number (4289112).

Almost surely, 2^28328785 is an apocalyptic number.

It is an amenable number.

28328785 is a deficient number, since it is larger than the sum of its proper divisors (5984111).

28328785 is a wasteful number, since it uses less digits than its factorization.

28328785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53063.

The product of its digits is 215040, while the sum is 43.

The square root of 28328785 is about 5322.4792155536. The cubic root of 28328785 is about 304.8428286331.

The spelling of 28328785 in words is "twenty-eight million, three hundred twenty-eight thousand, seven hundred eighty-five".