28068786 has 48 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 8870400.

The previous prime is 28068739. The next prime is 28068791. The reversal of 28068786 is 68786082.

It is a super-3 number, since 3×28068786³ (a number of 23 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 62290 + ... + 62738.

It is an arithmetic number, because the mean of its divisors is an integer number (1333800).

Almost surely, 2^28068786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28068786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32011200).

28068786 is an abundant number, since it is smaller than the sum of its proper divisors (35953614).

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

28068786 is a wasteful number, since it uses less digits than its factorization.

28068786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 28068786 is about 5297.9983012455. The cubic root of 28068786 is about 303.9073543286.

The spelling of 28068786 in words is "twenty-eight million, sixty-eight thousand, seven hundred eighty-six".