28205965 has 8 divisors (see below), whose sum is σ = 33903360. Its totient is φ = 22527312.

The previous prime is 28205963. The next prime is 28205977. The reversal of 28205965 is 56950282.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28205965 - 2¹ = 28205963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28205963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125 + ... + 7594.

It is an arithmetic number, because the mean of its divisors is an integer number (4237920).

Almost surely, 2^28205965 is an apocalyptic number.

It is an amenable number.

28205965 is a deficient number, since it is larger than the sum of its proper divisors (5697395).

28205965 is an equidigital number, since it uses as much as digits as its factorization.

28205965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9371.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 28205965 is about 5310.9288264860. The cubic root of 28205965 is about 304.4016397464.

The spelling of 28205965 in words is "twenty-eight million, two hundred five thousand, nine hundred sixty-five".