28828216 has 8 divisors (see below), whose sum is σ = 54052920. Its totient is φ = 14414104.

The previous prime is 28828213. The next prime is 28828231. The reversal of 28828216 is 61282882.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28828213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1801756 + ... + 1801771.

It is an arithmetic number, because the mean of its divisors is an integer number (6756615).

Almost surely, 2^28828216 is an apocalyptic number.

It is an amenable number.

28828216 is a deficient number, since it is larger than the sum of its proper divisors (25224704).

28828216 is a wasteful number, since it uses less digits than its factorization.

28828216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603533 (or 3603529 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 28828216 is about 5369.1913730095. The cubic root of 28828216 is about 306.6238430016.

The spelling of 28828216 in words is "twenty-eight million, eight hundred twenty-eight thousand, two hundred sixteen".