28193300 has 18 divisors (see below), whose sum is σ = 61179678. Its totient is φ = 11277280.

The previous prime is 28193287. The next prime is 28193317. The reversal of 28193300 is 339182.

It can be written as a sum of positive squares in 3 ways, for example, as 2650384 + 25542916 = 1628^2 + 5054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28193300.

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 5 ways as a sum of consecutive naturals, for example, 140867 + ... + 141066.

It is an arithmetic number, because the mean of its divisors is an integer number (3398871).

Almost surely, 2^28193300 is an apocalyptic number.

28193300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28193300 is an abundant number, since it is smaller than the sum of its proper divisors (32986378).

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

28193300 is a wasteful number, since it uses less digits than its factorization.

28193300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281947 (or 281940 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 28193300 is about 5309.7363399702. The cubic root of 28193300 is about 304.3560722699.

The spelling of 28193300 in words is "twenty-eight million, one hundred ninety-three thousand, three hundred".