28107200 has 84 divisors (see below), whose sum is σ = 75495912. Its totient is φ = 10214400.

The previous prime is 28107199. The next prime is 28107227. The reversal of 28107200 is 270182.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 16802 + ... + 18398.

Almost surely, 2^28107200 is an apocalyptic number.

28107200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28107200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37747956).

28107200 is an abundant number, since it is smaller than the sum of its proper divisors (47388712).

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

28107200 is a wasteful number, since it uses less digits than its factorization.

28107200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 28107200 is about 5301.6223931925. The cubic root of 28107200 is about 304.0459302717.

Adding to 28107200 its reverse (270182), we get a palindrome (28377382).

The spelling of 28107200 in words is "twenty-eight million, one hundred seven thousand, two hundred".