28168744 has 32 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 13004992.

The previous prime is 28168709. The next prime is 28168747. The reversal of 28168744 is 44786182.

It is a junction number, because it is equal to n+sod(n) for n = 28168697 and 28168706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28168747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2697 + ... + 7975.

It is an arithmetic number, because the mean of its divisors is an integer number (1782000).

Almost surely, 2^28168744 is an apocalyptic number.

It is an amenable number.

28168744 is an abundant number, since it is smaller than the sum of its proper divisors (28855256).

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

28168744 is a wasteful number, since it uses less digits than its factorization.

28168744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337 (or 5333 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 28168744 is about 5307.4234803716. The cubic root of 28168744 is about 304.2676832010.

The spelling of 28168744 in words is "twenty-eight million, one hundred sixty-eight thousand, seven hundred forty-four".