28136448 has 132 divisors (see below), whose sum is σ = 84303648. Its totient is φ = 9031680.

The previous prime is 28136447. The next prime is 28136461. The reversal of 28136448 is 84463182.

28136448 is a `hidden beast` number, since 2 + 8 + 1 + 3 + 644 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28136443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396253 + ... + 396323.

It is an arithmetic number, because the mean of its divisors is an integer number (638664).

Almost surely, 2^28136448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28136448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42151824).

28136448 is an abundant number, since it is smaller than the sum of its proper divisors (56167200).

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

28136448 is a wasteful number, since it uses less digits than its factorization.

28136448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 119 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 28136448 is about 5304.3800768799. The cubic root of 28136448 is about 304.1513558399.

It can be divided in two parts, 2813 and 6448, that added together give a cube (9261 = 21³).

The spelling of 28136448 in words is "twenty-eight million, one hundred thirty-six thousand, four hundred forty-eight".