28209102 has 16 divisors (see below), whose sum is σ = 56471040. Its totient is φ = 9394232.

The previous prime is 28209061. The next prime is 28209119. The reversal of 28209102 is 20190282.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 9649 + ... + 12227.

It is an arithmetic number, because the mean of its divisors is an integer number (3529440).

Almost surely, 2^28209102 is an apocalyptic number.

28209102 is an abundant number, since it is smaller than the sum of its proper divisors (28261938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28209102 is a wasteful number, since it uses less digits than its factorization.

28209102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 28209102 is about 5311.2241526789. The cubic root of 28209102 is about 304.4129242689.

Adding to 28209102 its reverse (20190282), we get a palindrome (48399384).

The spelling of 28209102 in words is "twenty-eight million, two hundred nine thousand, one hundred two".