28305404073 has 80 divisors (see below), whose sum is σ = 46463953536. Its totient is φ = 17100357120.

The previous prime is 28305404051. The next prime is 28305404087. The reversal of 28305404073 is 37040450382.

It is a happy number.

28305404073 is a `hidden beast` number, since 2 + 8 + 3 + 0 + 540 + 40 + 73 = 666.

It is not a de Polignac number, because 28305404073 - 2¹² = 28305399977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28305404573) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4200615 + ... + 4207347.

Almost surely, 2^28305404073 is an apocalyptic number.

It is an amenable number.

28305404073 is a deficient number, since it is larger than the sum of its proper divisors (18158549463).

28305404073 is a wasteful number, since it uses less digits than its factorization.

28305404073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876 (or 6867 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 28305404073 in words is "twenty-eight billion, three hundred five million, four hundred four thousand, seventy-three".