4039989 has 8 divisors (see below), whose sum is σ = 5670240. Its totient is φ = 2551536.

The previous prime is 4039967. The next prime is 4039991. The reversal of 4039989 is 9899304.

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

It is not a de Polignac number, because 4039989 - 2⁵ = 4039957 is a prime.

It is a super-2 number, since 2×4039989² = 32643022240242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

4039989 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4039989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4039949) 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, 35382 + ... + 35495.

It is an arithmetic number, because the mean of its divisors is an integer number (708780).

Almost surely, 2^4039989 is an apocalyptic number.

It is an amenable number.

4039989 is a deficient number, since it is larger than the sum of its proper divisors (1630251).

4039989 is a wasteful number, since it uses less digits than its factorization.

4039989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70899.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 4039989 is about 2009.9723878700. The cubic root of 4039989 is about 159.2673402860.

The spelling of 4039989 in words is "four million, thirty-nine thousand, nine hundred eighty-nine".