28272254 has 4 divisors (see below), whose sum is σ = 42408384. Its totient is φ = 14136126.

The previous prime is 28272203. The next prime is 28272259. The reversal of 28272254 is 45227282.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28272254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28272259) by changing a digit.

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 as a sum of consecutive naturals, namely, 7068062 + ... + 7068065.

It is an arithmetic number, because the mean of its divisors is an integer number (10602096).

Almost surely, 2^28272254 is an apocalyptic number.

28272254 is a deficient number, since it is larger than the sum of its proper divisors (14136130).

28272254 is a wasteful number, since it uses less digits than its factorization.

28272254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14136129.

The product of its digits is 17920, while the sum is 32.

The square root of 28272254 is about 5317.1659744642. The cubic root of 28272254 is about 304.6399190517.

The spelling of 28272254 in words is "twenty-eight million, two hundred seventy-two thousand, two hundred fifty-four".