28321300 has 36 divisors (see below), whose sum is σ = 70238560. Its totient is φ = 9709920.

The previous prime is 28321253. The next prime is 28321301. The reversal of 28321300 is 312382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19530 + ... + 20929.

Almost surely, 2^28321300 is an apocalyptic number.

28321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28321300 is an abundant number, since it is smaller than the sum of its proper divisors (41917260).

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

28321300 is a wasteful number, since it uses less digits than its factorization.

28321300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40480 (or 40473 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 28321300 is about 5321.7760193379. The cubic root of 28321300 is about 304.8159778573.

Adding to 28321300 its reverse (312382), we get a palindrome (28633682).

The spelling of 28321300 in words is "twenty-eight million, three hundred twenty-one thousand, three hundred".