28302300 has 216 divisors, whose sum is σ = 99524880. Its totient is φ = 6681600.

The previous prime is 28302293. The next prime is 28302311. The reversal of 28302300 is 320382.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 479671 + ... + 479729.

Almost surely, 2^28302300 is an apocalyptic number.

28302300 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 28302300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49762440).

28302300 is an abundant number, since it is smaller than the sum of its proper divisors (71222580).

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

28302300 is a wasteful number, since it uses less digits than its factorization.

28302300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 28302300 is about 5319.9906014955. The cubic root of 28302300 is about 304.7477983225.

Adding to 28302300 its reverse (320382), we get a palindrome (28622682).

The spelling of 28302300 in words is "twenty-eight million, three hundred two thousand, three hundred".