4020002002 has 8 divisors (see below), whose sum is σ = 6384709116. Its totient is φ = 1891765632.

The previous prime is 4020001991. The next prime is 4020002003. The reversal of 4020002002 is 2002000204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3016316241 + 1003685761 = 54921^2 + 31681^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 4020002002.

It is not an unprimeable number, because it can be changed into a prime (4020002003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59117643 + ... + 59117710.

Almost surely, 2^4020002002 is an apocalyptic number.

4020002002 is a deficient number, since it is larger than the sum of its proper divisors (2364707114).

4020002002 is a wasteful number, since it uses less digits than its factorization.

4020002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118235372.

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 4020002002 is about 63403.4857243669. The cubic root of 4020002002 is about 1590.0425871008.

Adding to 4020002002 its reverse (2002000204), we get a palindrome (6022002206).

The spelling of 4020002002 in words is "four billion, twenty million, two thousand, two".