28271455 has 8 divisors (see below), whose sum is σ = 34036704. Its totient is φ = 22543200.

The previous prime is 28271447. The next prime is 28271471. The reversal of 28271455 is 55417282.

It is a happy number.

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

It is not a de Polignac number, because 28271455 - 2³ = 28271447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28271455.

It is a congruent 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, 7536 + ... + 10645.

It is an arithmetic number, because the mean of its divisors is an integer number (4254588).

Almost surely, 2^28271455 is an apocalyptic number.

28271455 is a deficient number, since it is larger than the sum of its proper divisors (5765249).

28271455 is a wasteful number, since it uses less digits than its factorization.

28271455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18497.

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

The square root of 28271455 is about 5317.0908399237. The cubic root of 28271455 is about 304.6370492229.

The spelling of 28271455 in words is "twenty-eight million, two hundred seventy-one thousand, four hundred fifty-five".