28545300 has 216 divisors, whose sum is σ = 107243136. Its totient is φ = 6209280.

The previous prime is 28545299. The next prime is 28545313. The reversal of 28545300 is 354582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 144802 + ... + 144998.

It is an arithmetic number, because the mean of its divisors is an integer number (496496).

Almost surely, 2^28545300 is an apocalyptic number.

28545300 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 28545300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53621568).

28545300 is an abundant number, since it is smaller than the sum of its proper divisors (78697836).

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

28545300 is a wasteful number, since it uses less digits than its factorization.

28545300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 28545300 is about 5342.7801751523. The cubic root of 28545300 is about 305.6174894964.

Adding to 28545300 its reverse (354582), we get a palindrome (28899882).

The spelling of 28545300 in words is "twenty-eight million, five hundred forty-five thousand, three hundred".