28831673871 has 80 divisors (see below), whose sum is σ = 57827793408. Its totient is φ = 13825339200.

The previous prime is 28831673869. The next prime is 28831673881. The reversal of 28831673871 is 17837613882.

28831673871 is a `hidden beast` number, since 28 + 83 + 167 + 387 + 1 = 666.

It is not a de Polignac number, because 28831673871 - 2¹ = 28831673869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28831673831) 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 79 ways as a sum of consecutive naturals, for example, 96715 + ... + 258876.

Almost surely, 2^28831673871 is an apocalyptic number.

28831673871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28831673871 is an abundant number, since it is smaller than the sum of its proper divisors (28996119537).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28831673871 is a wasteful number, since it uses less digits than its factorization.

28831673871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355634 (or 355625 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 28831673871 in words is "twenty-eight billion, eight hundred thirty-one million, six hundred seventy-three thousand, eight hundred seventy-one".