28235304 has 40 divisors (see below), whose sum is σ = 79086810. Its totient is φ = 9411552.

The previous prime is 28235303. The next prime is 28235309. The reversal of 28235304 is 40353282.

It can be written as a sum of positive squares in only one way, i.e., 28196100 + 39204 = 5310^2 + 198^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28235303) 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 9 ways as a sum of consecutive naturals, for example, 21139 + ... + 22434.

Almost surely, 2^28235304 is an apocalyptic number.

28235304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28235304 is an abundant number, since it is smaller than the sum of its proper divisors (50851506).

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

28235304 is a wasteful number, since it uses less digits than its factorization.

28235304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43591 (or 43578 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 28235304 is about 5313.6902431361. The cubic root of 28235304 is about 304.5071463294.

Adding to 28235304 its reverse (40353282), we get a palindrome (68588586).

The spelling of 28235304 in words is "twenty-eight million, two hundred thirty-five thousand, three hundred four".