28481227 has 4 divisors (see below), whose sum is σ = 28640520. Its totient is φ = 28321936.

The previous prime is 28481207. The next prime is 28481249. The reversal of 28481227 is 72218482.

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 28481227 - 2¹⁹ = 27956939 is a prime.

It is a super-2 number, since 2×28481227² = 1622360582851058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28481192 and 28481201.

It is not an unprimeable number, because it can be changed into a prime (28481207) 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, 79378 + ... + 79735.

It is an arithmetic number, because the mean of its divisors is an integer number (7160130).

Almost surely, 2^28481227 is an apocalyptic number.

28481227 is a deficient number, since it is larger than the sum of its proper divisors (159293).

28481227 is a wasteful number, since it uses less digits than its factorization.

28481227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159292.

The product of its digits is 14336, while the sum is 34.

The square root of 28481227 is about 5336.7805838352. The cubic root of 28481227 is about 305.3886544065.

The spelling of 28481227 in words is "twenty-eight million, four hundred eighty-one thousand, two hundred twenty-seven".