28325387 has 8 divisors (see below), whose sum is σ = 29492256. Its totient is φ = 27179712.

The previous prime is 28325377. The next prime is 28325393. The reversal of 28325387 is 78352382.

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 28325387 - 2¹⁴ = 28309003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28325387.

It is not an unprimeable number, because it can be changed into a prime (28325357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543 + ... + 7944.

It is an arithmetic number, because the mean of its divisors is an integer number (3686532).

Almost surely, 2^28325387 is an apocalyptic number.

28325387 is a deficient number, since it is larger than the sum of its proper divisors (1166869).

28325387 is a wasteful number, since it uses less digits than its factorization.

28325387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10597.

The product of its digits is 80640, while the sum is 38.

The square root of 28325387 is about 5322.1599938371. The cubic root of 28325387 is about 304.8306396488.

The spelling of 28325387 in words is "twenty-eight million, three hundred twenty-five thousand, three hundred eighty-seven".