28537904873 has 4 divisors (see below), whose sum is σ = 28712984208. Its totient is φ = 28362825540.

The previous prime is 28537904839. The next prime is 28537904881. The reversal of 28537904873 is 37840973582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28537904873 - 2⁸ = 28537904617 is a prime.

It is a super-2 number, since 2×28537904873² (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 (28537904803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87539423 + ... + 87539748.

It is an arithmetic number, because the mean of its divisors is an integer number (7178246052).

Almost surely, 2^28537904873 is an apocalyptic number.

It is an amenable number.

28537904873 is a deficient number, since it is larger than the sum of its proper divisors (175079335).

28537904873 is a wasteful number, since it uses less digits than its factorization.

28537904873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175079334.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 28537904873 in words is "twenty-eight billion, five hundred thirty-seven million, nine hundred four thousand, eight hundred seventy-three".