28168535474 has 16 divisors (see below), whose sum is σ = 43159996800. Its totient is φ = 13781983824.

The previous prime is 28168535471. The next prime is 28168535497. The reversal of 28168535474 is 47453586182.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28168535471) 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, 526157 + ... + 577215.

It is an arithmetic number, because the mean of its divisors is an integer number (2697499800).

Almost surely, 2^28168535474 is an apocalyptic number.

28168535474 is a deficient number, since it is larger than the sum of its proper divisors (14991461326).

28168535474 is a wasteful number, since it uses less digits than its factorization.

28168535474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56977.

The product of its digits is 6451200, while the sum is 53.

The spelling of 28168535474 in words is "twenty-eight billion, one hundred sixty-eight million, five hundred thirty-five thousand, four hundred seventy-four".