28785531707 has 8 divisors (see below), whose sum is σ = 30551547600. Its totient is φ = 27027599104.

The previous prime is 28785531679. The next prime is 28785531713. The reversal of 28785531707 is 70713558782.

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 28785531707 - 2⁸ = 28785531451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28785531407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2013482 + ... + 2027727.

It is an arithmetic number, because the mean of its divisors is an integer number (3818943450).

Almost surely, 2^28785531707 is an apocalyptic number.

28785531707 is a deficient number, since it is larger than the sum of its proper divisors (1766015893).

28785531707 is a wasteful number, since it uses less digits than its factorization.

28785531707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041645.

The product of its (nonzero) digits is 3292800, while the sum is 53.

The spelling of 28785531707 in words is "twenty-eight billion, seven hundred eighty-five million, five hundred thirty-one thousand, seven hundred seven".