28170800 has 60 divisors (see below), whose sum is σ = 77356656. Its totient is φ = 9657600.

The previous prime is 28170797. The next prime is 28170811. The reversal of 28170800 is 807182.

It is a self number, because there is not a number n which added to its sum of digits gives 28170800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2231 + ... + 7830.

Almost surely, 2^28170800 is an apocalyptic number.

28170800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28170800 is an abundant number, since it is smaller than the sum of its proper divisors (49185856).

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

28170800 is a wasteful number, since it uses less digits than its factorization.

28170800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10086 (or 10075 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 28170800 is about 5307.6171678070. The cubic root of 28170800 is about 304.2750857217.

Adding to 28170800 its reverse (807182), we get a palindrome (28977982).

The spelling of 28170800 in words is "twenty-eight million, one hundred seventy thousand, eight hundred".