28534431768 has 32 divisors (see below), whose sum is σ = 71347834800. Its totient is φ = 9509909888.

The previous prime is 28534431733. The next prime is 28534431769. The reversal of 28534431768 is 86713443582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28534431768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28534431769) 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, 55630 + ... + 245282.

Almost surely, 2^28534431768 is an apocalyptic number.

It is an amenable number.

28534431768 is an abundant number, since it is smaller than the sum of its proper divisors (42813403032).

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

28534431768 is a wasteful number, since it uses less digits than its factorization.

28534431768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195931 (or 195927 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The spelling of 28534431768 in words is "twenty-eight billion, five hundred thirty-four million, four hundred thirty-one thousand, seven hundred sixty-eight".