28554321 has 8 divisors (see below), whose sum is σ = 40076320. Its totient is φ = 18034272.

The previous prime is 28554319. The next prime is 28554371. The reversal of 28554321 is 12345582.

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

It is not a de Polignac number, because 28554321 - 2¹ = 28554319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28554301) 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 7 ways as a sum of consecutive naturals, for example, 250420 + ... + 250533.

It is an arithmetic number, because the mean of its divisors is an integer number (5009540).

Almost surely, 2^28554321 is an apocalyptic number.

It is an amenable number.

28554321 is a deficient number, since it is larger than the sum of its proper divisors (11521999).

28554321 is a wasteful number, since it uses less digits than its factorization.

28554321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500975.

The product of its digits is 9600, while the sum is 30.

The square root of 28554321 is about 5343.6243318557. The cubic root of 28554321 is about 305.6496802598.

The spelling of 28554321 in words is "twenty-eight million, five hundred fifty-four thousand, three hundred twenty-one".