28361304 has 144 divisors (see below), whose sum is σ = 86205600. Its totient is φ = 8408064.

The previous prime is 28361293. The next prime is 28361309. The reversal of 28361304 is 40316382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28361309) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 603409 + ... + 603455.

It is an arithmetic number, because the mean of its divisors is an integer number (598650).

Almost surely, 2^28361304 is an apocalyptic number.

28361304 is a gapful number since it is divisible by the number (24) 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 28361304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43102800).

28361304 is an abundant number, since it is smaller than the sum of its proper divisors (57844296).

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

28361304 is a wasteful number, since it uses less digits than its factorization.

28361304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28361304 is about 5325.5332127403. The cubic root of 28361304 is about 304.9594284473.

Adding to 28361304 its reverse (40316382), we get a palindrome (68677686).

The spelling of 28361304 in words is "twenty-eight million, three hundred sixty-one thousand, three hundred four".