28016766 has 40 divisors (see below), whose sum is σ = 63222984. Its totient is φ = 9272880.

The previous prime is 28016759. The next prime is 28016771. The reversal of 28016766 is 66761082.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28016766.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 25876 + ... + 26936.

Almost surely, 2^28016766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28016766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31611492).

28016766 is an abundant number, since it is smaller than the sum of its proper divisors (35206218).

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

28016766 is a wasteful number, since it uses less digits than its factorization.

28016766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28016766 is about 5293.0866231340. The cubic root of 28016766 is about 303.7194939642.

It can be divided in two parts, 28016 and 766, that added together give a palindrome (28782).

The spelling of 28016766 in words is "twenty-eight million, sixteen thousand, seven hundred sixty-six".