28056168 has 48 divisors (see below), whose sum is σ = 86842080.
Its totient is φ = 8015904.
The previous prime is 28056143. The next prime is 28056187. The reversal of 28056168 is 86165082.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is an unprimeable number.
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 11 ways as a sum of consecutive naturals, for example, 27330 + ... + 28337.
It is an arithmetic number, because the mean of its divisors is an integer number (1809210).
Almost surely, 228056168 is an apocalyptic number.
28056168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.
It is an amenable number.
28056168 is an abundant number, since it is smaller than the sum of its proper divisors (58785912).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28056168 is a wasteful number, since it uses less digits than its factorization.
28056168 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 55686 (or 55679 counting only the distinct ones).
The product of its (nonzero) digits is 23040, while the sum is 36.
The square root of 28056168 is about 5296.8073402758.
The cubic root of 28056168 is about 303.8618081508.
It can be divided in two parts, 28056 and 168, that added together give a square (28224 = 1682).
The spelling of 28056168 in words is "twenty-eight million, fifty-six thousand, one hundred sixty-eight".