28107648 has 80 divisors (see below), whose sum is σ = 83678760. Its totient is φ = 9365760.

The previous prime is 28107643. The next prime is 28107661. The reversal of 28107648 is 84670182.

28107648 is a `hidden beast` number, since 2 + 8 + 1 + 0 + 7 + 648 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28107643) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 9013 + ... + 11723.

Almost surely, 2^28107648 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 28107648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41839380).

28107648 is an abundant number, since it is smaller than the sum of its proper divisors (55571112).

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

28107648 is an equidigital number, since it uses as much as digits as its factorization.

28107648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28107648 is about 5301.6646442415. The cubic root of 28107648 is about 304.0475456567.

The spelling of 28107648 in words is "twenty-eight million, one hundred seven thousand, six hundred forty-eight".