86640443 has 8 divisors (see below), whose sum is σ = 89543040. Its totient is φ = 83744640.

The previous prime is 86640439. The next prime is 86640451. The reversal of 86640443 is 34404668.

It is a happy number.

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

It is not a de Polignac number, because 86640443 - 2² = 86640439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86640413) 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 7 ways as a sum of consecutive naturals, for example, 45221 + ... + 47097.

It is an arithmetic number, because the mean of its divisors is an integer number (11192880).

Almost surely, 2^86640443 is an apocalyptic number.

86640443 is a deficient number, since it is larger than the sum of its proper divisors (2902597).

86640443 is a wasteful number, since it uses less digits than its factorization.

86640443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 86640443 is about 9308.0848191236. The cubic root of 86640443 is about 442.4934924086.

The spelling of 86640443 in words is "eighty-six million, six hundred forty thousand, four hundred forty-three".