4002002 has 8 divisors (see below), whose sum is σ = 6025212. Its totient is φ = 1993600.

The previous prime is 4002001. The next prime is 4002013. The reversal of 4002002 is 2002004.

It can be written as a sum of positive squares in 2 ways, for example, as 3798601 + 203401 = 1949^2 + 451^2 .

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

It is an Ulam number.

4002002 is a modest number, since divided by 2002 gives 4 as remainder.

It is not an unprimeable number, because it can be changed into a prime (4002001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999 + ... + 4122.

Almost surely, 2^4002002 is an apocalyptic number.

4002002 is a deficient number, since it is larger than the sum of its proper divisors (2023210).

4002002 is a wasteful number, since it uses less digits than its factorization.

4002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404.

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 4002002 is about 2000.5004373906. The cubic root of 4002002 is about 158.7665839207.

Adding to 4002002 its reverse (2002004), we get a palindrome (6004006).

The spelling of 4002002 in words is "four million, two thousand, two", and thus it is an eban number.