80640889 has 8 divisors (see below), whose sum is σ = 95134208. Its totient is φ = 66890880.

The previous prime is 80640881. The next prime is 80640893. The reversal of 80640889 is 98804608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80640889 - 2³ = 80640881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80640881) 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 7 ways as a sum of consecutive naturals, for example, 185592 + ... + 186025.

It is an arithmetic number, because the mean of its divisors is an integer number (11891776).

Almost surely, 2^80640889 is an apocalyptic number.

It is an amenable number.

80640889 is a deficient number, since it is larger than the sum of its proper divisors (14493319).

80640889 is a wasteful number, since it uses less digits than its factorization.

80640889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371655.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 80640889 is about 8980.0272271302. The cubic root of 80640889 is about 432.0345069173.

The spelling of 80640889 in words is "eighty million, six hundred forty thousand, eight hundred eighty-nine".