28036400 has 240 divisors, whose sum is σ = 88565760. Its totient is φ = 8294400.

The previous prime is 28036391. The next prime is 28036403. The reversal of 28036400 is 463082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28036403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 904385 + ... + 904415.

It is an arithmetic number, because the mean of its divisors is an integer number (369024).

Almost surely, 2^28036400 is an apocalyptic number.

28036400 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 28036400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44282880).

28036400 is an abundant number, since it is smaller than the sum of its proper divisors (60529360).

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

28036400 is a wasteful number, since it uses less digits than its factorization.

28036400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28036400 is about 5294.9409817296. The cubic root of 28036400 is about 303.7904257304.

Adding to 28036400 its reverse (463082), we get a palindrome (28499482).

The spelling of 28036400 in words is "twenty-eight million, thirty-six thousand, four hundred".