40485689 has 4 divisors (see below), whose sum is σ = 40551924. Its totient is φ = 40419456.

The previous prime is 40485673. The next prime is 40485701. The reversal of 40485689 is 98658404.

It is a happy number.

40485689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22278400 + 18207289 = 4720^2 + 4267^2 .

It is a cyclic number.

It is not a de Polignac number, because 40485689 - 2⁴ = 40485673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40485629) 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 3 ways as a sum of consecutive naturals, for example, 32192 + ... + 33425.

It is an arithmetic number, because the mean of its divisors is an integer number (10137981).

Almost surely, 2^40485689 is an apocalyptic number.

It is an amenable number.

40485689 is a deficient number, since it is larger than the sum of its proper divisors (66235).

40485689 is an equidigital number, since it uses as much as digits as its factorization.

40485689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66234.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 40485689 is about 6362.8365529848. The cubic root of 40485689 is about 343.3738186043.

The spelling of 40485689 in words is "forty million, four hundred eighty-five thousand, six hundred eighty-nine".