28168756 has 24 divisors (see below), whose sum is σ = 61459776. Its totient is φ = 10974720.

The previous prime is 28168747. The next prime is 28168757. The reversal of 28168756 is 65786182.

It is a super-3 number, since 3×28168756³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28168757) 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, 45421 + ... + 46036.

It is an arithmetic number, because the mean of its divisors is an integer number (2560824).

Almost surely, 2^28168756 is an apocalyptic number.

It is an amenable number.

28168756 is an abundant number, since it is smaller than the sum of its proper divisors (33291020).

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

28168756 is a wasteful number, since it uses less digits than its factorization.

28168756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91479 (or 91477 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 28168756 is about 5307.4246108635. The cubic root of 28168756 is about 304.2677264074.

The spelling of 28168756 in words is "twenty-eight million, one hundred sixty-eight thousand, seven hundred fifty-six".