28455271 has 16 divisors (see below), whose sum is σ = 31667328. Its totient is φ = 25401600.

The previous prime is 28455221. The next prime is 28455277. The reversal of 28455271 is 17255482.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28455271 - 2¹⁷ = 28324199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455277) 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 15 ways as a sum of consecutive naturals, for example, 104866 + ... + 105136.

It is an arithmetic number, because the mean of its divisors is an integer number (1979208).

Almost surely, 2^28455271 is an apocalyptic number.

28455271 is a deficient number, since it is larger than the sum of its proper divisors (3212057).

28455271 is a wasteful number, since it uses less digits than its factorization.

28455271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its digits is 22400, while the sum is 34.

The square root of 28455271 is about 5334.3482263534. The cubic root of 28455271 is about 305.2958555360.

It can be divided in two parts, 284 and 55271, that added together give a palindrome (55555).

The spelling of 28455271 in words is "twenty-eight million, four hundred fifty-five thousand, two hundred seventy-one".