4040689 has 8 divisors (see below), whose sum is σ = 4142880. Its totient is φ = 3939936.

The previous prime is 4040683. The next prime is 4040717. The reversal of 4040689 is 9860404.

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

It is a cyclic number.

It is not a de Polignac number, because 4040689 - 2¹¹ = 4038641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4040689.

It is not an unprimeable number, because it can be changed into a prime (4040683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7114 + ... + 7660.

It is an arithmetic number, because the mean of its divisors is an integer number (517860).

Almost surely, 2^4040689 is an apocalyptic number.

It is an amenable number.

4040689 is a deficient number, since it is larger than the sum of its proper divisors (102191).

4040689 is an equidigital number, since it uses as much as digits as its factorization.

4040689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 4040689 is about 2010.1465120732. The cubic root of 4040689 is about 159.2765383885.

The spelling of 4040689 in words is "four million, forty thousand, six hundred eighty-nine".