28857305487 has 8 divisors (see below), whose sum is σ = 38688984880. Its totient is φ = 19131914880.

The previous prime is 28857305467. The next prime is 28857305489. The reversal of 28857305487 is 78450375882.

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

It is not a de Polignac number, because 28857305487 - 2²⁶ = 28790196623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857305489) 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, 26571562 + ... + 26572647.

It is an arithmetic number, because the mean of its divisors is an integer number (4836123110).

Almost surely, 2^28857305487 is an apocalyptic number.

28857305487 is a deficient number, since it is larger than the sum of its proper divisors (9831679393).

28857305487 is a wasteful number, since it uses less digits than its factorization.

28857305487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53144393.

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 28857305487 in words is "twenty-eight billion, eight hundred fifty-seven million, three hundred five thousand, four hundred eighty-seven".