83640718 has 8 divisors (see below), whose sum is σ = 143384112. Its totient is φ = 35846016.

The previous prime is 83640707. The next prime is 83640743. The reversal of 83640718 is 81704638.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2987155 + ... + 2987182.

It is an arithmetic number, because the mean of its divisors is an integer number (17923014).

Almost surely, 2^83640718 is an apocalyptic number.

83640718 is a deficient number, since it is larger than the sum of its proper divisors (59743394).

83640718 is a wasteful number, since it uses less digits than its factorization.

83640718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974346.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 83640718 is about 9145.5299463727. The cubic root of 83640718 is about 437.3266238736.

The spelling of 83640718 in words is "eighty-three million, six hundred forty thousand, seven hundred eighteen".