4081989 has 8 divisors (see below), whose sum is σ = 5762880. Its totient is φ = 2561216.

The previous prime is 4081969. The next prime is 4081991. The reversal of 4081989 is 9891804.

4081989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4081989 - 2⁸ = 4081733 is a prime.

It is a super-2 number, since 2×4081989² = 33325268392242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4081949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39969 + ... + 40070.

It is an arithmetic number, because the mean of its divisors is an integer number (720360).

Almost surely, 2^4081989 is an apocalyptic number.

It is an amenable number.

4081989 is a deficient number, since it is larger than the sum of its proper divisors (1680891).

4081989 is a wasteful number, since it uses less digits than its factorization.

4081989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80059.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 4081989 is about 2020.3932785475. The cubic root of 4081989 is about 159.8173566924.

The spelling of 4081989 in words is "four million, eighty-one thousand, nine hundred eighty-nine".