28305578011 has 8 divisors (see below), whose sum is σ = 28583852544. Its totient is φ = 28027370280.

The previous prime is 28305578003. The next prime is 28305578047. The reversal of 28305578011 is 11087550382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28305578011 - 2³ = 28305578003 is a prime.

It is a super-2 number, since 2×28305578011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28305573011) by changing a digit.

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, 1546926 + ... + 1565116.

It is an arithmetic number, because the mean of its divisors is an integer number (3572981568).

Almost surely, 2^28305578011 is an apocalyptic number.

28305578011 is a deficient number, since it is larger than the sum of its proper divisors (278274533).

28305578011 is a wasteful number, since it uses less digits than its factorization.

28305578011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33401.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 28305578011 in words is "twenty-eight billion, three hundred five million, five hundred seventy-eight thousand, eleven".