28048400 has 30 divisors (see below), whose sum is σ = 67387242. Its totient is φ = 11219200.

The previous prime is 28048399. The next prime is 28048403. The reversal of 28048400 is 484082.

It can be written as a sum of positive squares in 3 ways, for example, as 784 + 28047616 = 28^2 + 5296^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28048400.

It is not an unprimeable number, because it can be changed into a prime (28048403) 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 5 ways as a sum of consecutive naturals, for example, 34661 + ... + 35460.

Almost surely, 2^28048400 is an apocalyptic number.

28048400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28048400 is an abundant number, since it is smaller than the sum of its proper divisors (39338842).

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

28048400 is a wasteful number, since it uses less digits than its factorization.

28048400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70139 (or 70128 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 28048400 is about 5296.0740176096. The cubic root of 28048400 is about 303.8337618355.

The spelling of 28048400 in words is "twenty-eight million, forty-eight thousand, four hundred".