28327578 has 8 divisors (see below), whose sum is σ = 56655168. Its totient is φ = 9442524.

The previous prime is 28327573. The next prime is 28327591. The reversal of 28327578 is 87572382.

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

28327578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28327573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2360626 + ... + 2360637.

It is an arithmetic number, because the mean of its divisors is an integer number (7081896).

Almost surely, 2^28327578 is an apocalyptic number.

28327578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28327578 is a wasteful number, since it uses less digits than its factorization.

28327578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721268.

The product of its digits is 188160, while the sum is 42.

The square root of 28327578 is about 5322.3658273366. The cubic root of 28327578 is about 304.8384991084.

The spelling of 28327578 in words is "twenty-eight million, three hundred twenty-seven thousand, five hundred seventy-eight".