28287146438 has 16 divisors (see below), whose sum is σ = 42570181584. Its totient is φ = 14097119520.

The previous prime is 28287146417. The next prime is 28287146443. The reversal of 28287146438 is 83464178282.

28287146438 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 28287146438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2100968 + ... + 2114388.

It is an arithmetic number, because the mean of its divisors is an integer number (2660636349).

Almost surely, 2^28287146438 is an apocalyptic number.

28287146438 is a deficient number, since it is larger than the sum of its proper divisors (14283035146).

28287146438 is a wasteful number, since it uses less digits than its factorization.

28287146438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16807.

The product of its digits is 4128768, while the sum is 53.

The spelling of 28287146438 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred forty-six thousand, four hundred thirty-eight".