28227284 has 6 divisors (see below), whose sum is σ = 49397754. Its totient is φ = 14113640.

The previous prime is 28227281. The next prime is 28227289. The reversal of 28227284 is 48272282.

It can be written as a sum of positive squares in only one way, i.e., 21362884 + 6864400 = 4622^2 + 2620^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28227281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3528407 + ... + 3528414.

It is an arithmetic number, because the mean of its divisors is an integer number (8232959).

Almost surely, 2^28227284 is an apocalyptic number.

It is an amenable number.

28227284 is a deficient number, since it is larger than the sum of its proper divisors (21170470).

28227284 is a wasteful number, since it uses less digits than its factorization.

28227284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7056825 (or 7056823 counting only the distinct ones).

The product of its digits is 28672, while the sum is 35.

The square root of 28227284 is about 5312.9355350879. The cubic root of 28227284 is about 304.4783127036.

The spelling of 28227284 in words is "twenty-eight million, two hundred twenty-seven thousand, two hundred eighty-four".