80005891 has 32 divisors (see below), whose sum is σ = 99348480. Its totient is φ = 62954496.

The previous prime is 80005879. The next prime is 80005897. The reversal of 80005891 is 19850008.

It is not a de Polignac number, because 80005891 - 2⁹ = 80005379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80005897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733945 + ... + 734053.

It is an arithmetic number, because the mean of its divisors is an integer number (3104640).

Almost surely, 2^80005891 is an apocalyptic number.

80005891 is a deficient number, since it is larger than the sum of its proper divisors (19342589).

80005891 is a wasteful number, since it uses less digits than its factorization.

80005891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 80005891 is about 8944.6012208482. The cubic root of 80005891 is about 430.8975142257.

Adding to 80005891 its reverse (19850008), we get a palindrome (99855899).

The spelling of 80005891 in words is "eighty million, five thousand, eight hundred ninety-one".