80856873 has 40 divisors (see below), whose sum is σ = 125592192. Its totient is φ = 51806304.

The previous prime is 80856871. The next prime is 80856883. The reversal of 80856873 is 37865808.

80856873 is a `hidden beast` number, since 80 + 8 + 568 + 7 + 3 = 666.

It is not a de Polignac number, because 80856873 - 2¹ = 80856871 is a prime.

It is a super-2 number, since 2×80856873² = 13075667822676258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80856871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 254911 + ... + 255227.

Almost surely, 2^80856873 is an apocalyptic number.

It is an amenable number.

80856873 is a deficient number, since it is larger than the sum of its proper divisors (44735319).

80856873 is a wasteful number, since it uses less digits than its factorization.

80856873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 80856873 is about 8992.0449843181. The cubic root of 80856873 is about 432.4198753416.

The spelling of 80856873 in words is "eighty million, eight hundred fifty-six thousand, eight hundred seventy-three".