28000016 has 40 divisors (see below), whose sum is σ = 61763904. Its totient is φ = 12172160.

The previous prime is 27999943. The next prime is 28000019. The reversal of 28000016 is 61000082.

It is a junction number, because it is equal to n+sod(n) for n = 27999958 and 28000003.

It is not an unprimeable number, because it can be changed into a prime (28000019) 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 7 ways as a sum of consecutive naturals, for example, 590 + ... + 7506.

Almost surely, 2^28000016 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 28000016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30881952).

28000016 is an abundant number, since it is smaller than the sum of its proper divisors (33763888).

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

28000016 is a wasteful number, since it uses less digits than its factorization.

28000016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6959 (or 6953 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 28000016 is about 5291.5041339869. The cubic root of 28000016 is about 303.6589550273.

Adding to 28000016 its reverse (61000082), we get a palindrome (89000098).

The spelling of 28000016 in words is "twenty-eight million, sixteen", and thus it is an aban number and an uban number.