28253204 has 36 divisors (see below), whose sum is σ = 58758336. Its totient is φ = 11847024.

The previous prime is 28253191. The next prime is 28253207. The reversal of 28253204 is 40235282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253207) 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, 7679 + ... + 10745.

It is an arithmetic number, because the mean of its divisors is an integer number (1632176).

Almost surely, 2^28253204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28253204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29379168).

28253204 is an abundant number, since it is smaller than the sum of its proper divisors (30505132).

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

28253204 is a wasteful number, since it uses less digits than its factorization.

28253204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132 (or 3123 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28253204 is about 5315.3743047880. The cubic root of 28253204 is about 304.5714809946.

Adding to 28253204 its reverse (40235282), we get a palindrome (68488486).

The spelling of 28253204 in words is "twenty-eight million, two hundred fifty-three thousand, two hundred four".