28180300 has 18 divisors (see below), whose sum is σ = 61151468. Its totient is φ = 11272080.

The previous prime is 28180261. The next prime is 28180309. The reversal of 28180300 is 308182.

It is not an unprimeable number, because it can be changed into a prime (28180309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140802 + ... + 141001.

Almost surely, 2^28180300 is an apocalyptic number.

28180300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28180300 is an abundant number, since it is smaller than the sum of its proper divisors (32971168).

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

28180300 is a wasteful number, since it uses less digits than its factorization.

28180300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281817 (or 281810 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 28180300 is about 5308.5120325756. The cubic root of 28180300 is about 304.3092853001.

Adding to 28180300 its reverse (308182), we get a palindrome (28488482).

The spelling of 28180300 in words is "twenty-eight million, one hundred eighty thousand, three hundred".