28042368 has 64 divisors (see below), whose sum is σ = 75316800. Its totient is φ = 9243648.

The previous prime is 28042363. The next prime is 28042369. The reversal of 28042368 is 86324082.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (28042363) 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 7 ways as a sum of consecutive naturals, for example, 39198 + ... + 39906.

It is an arithmetic number, because the mean of its divisors is an integer number (1176825).

Almost surely, 2^28042368 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 28042368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37658400).

28042368 is an abundant number, since it is smaller than the sum of its proper divisors (47274432).

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

28042368 is a wasteful number, since it uses less digits than its factorization.

28042368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28042368 is about 5295.5045085431. The cubic root of 28042368 is about 303.8119797653.

The spelling of 28042368 in words is "twenty-eight million, forty-two thousand, three hundred sixty-eight".