28320814412 has 12 divisors (see below), whose sum is σ = 54067009416. Its totient is φ = 12873097440.

The previous prime is 28320814399. The next prime is 28320814433. The reversal of 28320814412 is 21441802382.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321827393 + ... + 321827480.

It is an arithmetic number, because the mean of its divisors is an integer number (4505584118).

Almost surely, 2^28320814412 is an apocalyptic number.

28320814412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28320814412 is a deficient number, since it is larger than the sum of its proper divisors (25746195004).

28320814412 is a wasteful number, since it uses less digits than its factorization.

28320814412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643654888 (or 643654886 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The spelling of 28320814412 in words is "twenty-eight billion, three hundred twenty million, eight hundred fourteen thousand, four hundred twelve".