28754216 has 8 divisors (see below), whose sum is σ = 53914170. Its totient is φ = 14377104.

The previous prime is 28754213. The next prime is 28754233. The reversal of 28754216 is 61245782.

It can be written as a sum of positive squares in only one way, i.e., 18957316 + 9796900 = 4354^2 + 3130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28754213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1797131 + ... + 1797146.

Almost surely, 2^28754216 is an apocalyptic number.

It is an amenable number.

28754216 is a deficient number, since it is larger than the sum of its proper divisors (25159954).

28754216 is a wasteful number, since it uses less digits than its factorization.

28754216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594283 (or 3594279 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 28754216 is about 5362.2957769970. The cubic root of 28754216 is about 306.3612575910.

Adding to 28754216 its reverse (61245782), we get a palindrome (89999998).

The spelling of 28754216 in words is "twenty-eight million, seven hundred fifty-four thousand, two hundred sixteen".