4002039 has 6 divisors (see below), whose sum is σ = 5780736. Its totient is φ = 2668020.

The previous prime is 4002017. The next prime is 4002041. The reversal of 4002039 is 9302004.

It is not a de Polignac number, because 4002039 - 2⁹ = 4001527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002049) 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 5 ways as a sum of consecutive naturals, for example, 222327 + ... + 222344.

It is an arithmetic number, because the mean of its divisors is an integer number (963456).

Almost surely, 2^4002039 is an apocalyptic number.

4002039 is a deficient number, since it is larger than the sum of its proper divisors (1778697).

4002039 is a wasteful number, since it uses less digits than its factorization.

4002039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444677 (or 444674 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 4002039 is about 2000.5096850553. The cubic root of 4002039 is about 158.7670732046.

The spelling of 4002039 in words is "four million, two thousand, thirty-nine".