28320814406 has 16 divisors (see below), whose sum is σ = 43189990128. Its totient is φ = 13924284000.

The previous prime is 28320814399. The next prime is 28320814433. The reversal of 28320814406 is 60441802382.

It is a self number, because there is not a number n which added to its sum of digits gives 28320814406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420161 + ... + 482883.

It is an arithmetic number, because the mean of its divisors is an integer number (2699374383).

Almost surely, 2^28320814406 is an apocalyptic number.

28320814406 is a deficient number, since it is larger than the sum of its proper divisors (14869175722).

28320814406 is a wasteful number, since it uses less digits than its factorization.

28320814406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66487.

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 28320814406 in words is "twenty-eight billion, three hundred twenty million, eight hundred fourteen thousand, four hundred six".