28166468834 has 32 divisors (see below), whose sum is σ = 49981553280. Its totient is φ = 11647819008.

The previous prime is 28166468833. The next prime is 28166468867. The reversal of 28166468834 is 43886466182.

It is a self number, because there is not a number n which added to its sum of digits gives 28166468834.

It is not an unprimeable number, because it can be changed into a prime (28166468833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655994 + ... + 697610.

It is an arithmetic number, because the mean of its divisors is an integer number (1561923540).

Almost surely, 2^28166468834 is an apocalyptic number.

28166468834 is a deficient number, since it is larger than the sum of its proper divisors (21815084446).

28166468834 is a wasteful number, since it uses less digits than its factorization.

28166468834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43322.

The product of its digits is 10616832, while the sum is 56.

The spelling of 28166468834 in words is "twenty-eight billion, one hundred sixty-six million, four hundred sixty-eight thousand, eight hundred thirty-four".