28857239173 has 32 divisors (see below), whose sum is σ = 34246768640. Its totient is φ = 23794560000.

The previous prime is 28857239161. The next prime is 28857239207. The reversal of 28857239173 is 37193275882.

It is a cyclic number.

It is not a de Polignac number, because 28857239173 - 2¹⁷ = 28857108101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857239123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48015073 + ... + 48015673.

It is an arithmetic number, because the mean of its divisors is an integer number (1070211520).

Almost surely, 2^28857239173 is an apocalyptic number.

It is an amenable number.

28857239173 is a deficient number, since it is larger than the sum of its proper divisors (5389529467).

28857239173 is a wasteful number, since it uses less digits than its factorization.

28857239173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589.

The product of its digits is 5080320, while the sum is 55.

The spelling of 28857239173 in words is "twenty-eight billion, eight hundred fifty-seven million, two hundred thirty-nine thousand, one hundred seventy-three".