28041768 has 64 divisors (see below), whose sum is σ = 78408000. Its totient is φ = 9285696.

The previous prime is 28041703. The next prime is 28041773. The reversal of 28041768 is 86714082.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42223 + ... + 42881.

It is an arithmetic number, because the mean of its divisors is an integer number (1225125).

Almost surely, 2^28041768 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 28041768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39204000).

28041768 is an abundant number, since it is smaller than the sum of its proper divisors (50366232).

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

28041768 is a wasteful number, since it uses less digits than its factorization.

28041768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 861 counting only the distinct ones).

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

The square root of 28041768 is about 5295.4478564140. The cubic root of 28041768 is about 303.8098129430.

The spelling of 28041768 in words is "twenty-eight million, forty-one thousand, seven hundred sixty-eight".