28305300 has 36 divisors (see below), whose sum is σ = 81897536. Its totient is φ = 7548000.

The previous prime is 28305227. The next prime is 28305313. The reversal of 28305300 is 350382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46876 + ... + 47475.

Almost surely, 2^28305300 is an apocalyptic number.

28305300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28305300 is an abundant number, since it is smaller than the sum of its proper divisors (53592236).

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

28305300 is a wasteful number, since it uses less digits than its factorization.

28305300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94368 (or 94361 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 28305300 is about 5320.2725494095. The cubic root of 28305300 is about 304.7585655404.

Adding to 28305300 its reverse (350382), we get a palindrome (28655682).

The spelling of 28305300 in words is "twenty-eight million, three hundred five thousand, three hundred".