28320814405 has 32 divisors (see below), whose sum is σ = 36914169600. Its totient is φ = 20734520832.

The previous prime is 28320814399. The next prime is 28320814433. The reversal of 28320814405 is 50441802382.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28320814405 - 2³ = 28320814397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4436506 + ... + 4442884.

It is an arithmetic number, because the mean of its divisors is an integer number (1153567800).

Almost surely, 2^28320814405 is an apocalyptic number.

It is an amenable number.

28320814405 is a deficient number, since it is larger than the sum of its proper divisors (8593355195).

28320814405 is a wasteful number, since it uses less digits than its factorization.

28320814405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973.

The product of its (nonzero) digits is 61440, while the sum is 37.

The spelling of 28320814405 in words is "twenty-eight billion, three hundred twenty million, eight hundred fourteen thousand, four hundred five".