28204360 has 128 divisors (see below), whose sum is σ = 73872000. Its totient is φ = 9621504.

The previous prime is 28204357. The next prime is 28204361. The reversal of 28204360 is 6340282.

It is a happy number.

28204360 is nontrivially palindromic in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28204361) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 478011 + ... + 478069.

It is an arithmetic number, because the mean of its divisors is an integer number (577125).

Almost surely, 2^28204360 is an apocalyptic number.

28204360 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 28204360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36936000).

28204360 is an abundant number, since it is smaller than the sum of its proper divisors (45667640).

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

28204360 is a wasteful number, since it uses less digits than its factorization.

28204360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 28204360 is about 5310.7777208239. Note that the first 4 decimals coincide. The cubic root of 28204360 is about 304.3958658625.

The spelling of 28204360 in words is "twenty-eight million, two hundred four thousand, three hundred sixty".