28254224 has 20 divisors (see below), whose sum is σ = 55641900. Its totient is φ = 13895040.

The previous prime is 28254209. The next prime is 28254227. The reversal of 28254224 is 42245282.

It can be written as a sum of positive squares in 2 ways, for example, as 15523600 + 12730624 = 3940^2 + 3568^2 .

It is not an unprimeable number, because it can be changed into a prime (28254227) 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, 13499 + ... + 15450.

It is an arithmetic number, because the mean of its divisors is an integer number (2782095).

Almost surely, 2^28254224 is an apocalyptic number.

It is an amenable number.

28254224 is a deficient number, since it is larger than the sum of its proper divisors (27387676).

28254224 is a wasteful number, since it uses less digits than its factorization.

28254224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29018 (or 29012 counting only the distinct ones).

The product of its digits is 10240, while the sum is 29.

The square root of 28254224 is about 5315.4702520097. The cubic root of 28254224 is about 304.5751461739.

The spelling of 28254224 in words is "twenty-eight million, two hundred fifty-four thousand, two hundred twenty-four".