28331504873 has 6 divisors (see below), whose sum is σ = 32957056746. Its totient is φ = 24284146992.

The previous prime is 28331504863. The next prime is 28331504881. The reversal of 28331504873 is 37840513382.

It can be written as a sum of positive squares in only one way, i.e., 26763978409 + 1567526464 = 163597^2 + 39592^2 .

It is not a de Polignac number, because 28331504873 - 2¹⁴ = 28331488489 is a prime.

It is a super-2 number, since 2×28331504873² (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 (28331504863) 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 5 ways as a sum of consecutive naturals, for example, 289096940 + ... + 289097037.

It is an arithmetic number, because the mean of its divisors is an integer number (5492842791).

Almost surely, 2^28331504873 is an apocalyptic number.

It is an amenable number.

28331504873 is a deficient number, since it is larger than the sum of its proper divisors (4625551873).

28331504873 is an equidigital number, since it uses as much as digits as its factorization.

28331504873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578193991 (or 578193984 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 28331504873 in words is "twenty-eight billion, three hundred thirty-one million, five hundred four thousand, eight hundred seventy-three".