28227545 has 8 divisors (see below), whose sum is σ = 34069896. Its totient is φ = 22450816.

The previous prime is 28227523. The next prime is 28227649. The reversal of 28227545 is 54572282.

It can be written as a sum of positive squares in 4 ways, for example, as 10679824 + 17547721 = 3268^2 + 4189^2 .

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 28227545 - 2⁶ = 28227481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15452 + ... + 17181.

It is an arithmetic number, because the mean of its divisors is an integer number (4258737).

Almost surely, 2^28227545 is an apocalyptic number.

It is an amenable number.

28227545 is a deficient number, since it is larger than the sum of its proper divisors (5842351).

28227545 is a wasteful number, since it uses less digits than its factorization.

28227545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32811.

The product of its digits is 44800, while the sum is 35.

The square root of 28227545 is about 5312.9600977233. The cubic root of 28227545 is about 304.4792511407.

The spelling of 28227545 in words is "twenty-eight million, two hundred twenty-seven thousand, five hundred forty-five".