28664327 has 4 divisors (see below), whose sum is σ = 29134296. Its totient is φ = 28194360.

The previous prime is 28664309. The next prime is 28664341. The reversal of 28664327 is 72346682.

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

It is a cyclic number.

It is not a de Polignac number, because 28664327 - 2⁸ = 28664071 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 (28664387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234893 + ... + 235014.

It is an arithmetic number, because the mean of its divisors is an integer number (7283574).

Almost surely, 2^28664327 is an apocalyptic number.

28664327 is a deficient number, since it is larger than the sum of its proper divisors (469969).

28664327 is an equidigital number, since it uses as much as digits as its factorization.

28664327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469968.

The product of its digits is 96768, while the sum is 38.

The square root of 28664327 is about 5353.9076383516. The cubic root of 28664327 is about 306.0416841273.

The spelling of 28664327 in words is "twenty-eight million, six hundred sixty-four thousand, three hundred twenty-seven".