4000002 has 8 divisors (see below), whose sum is σ = 8000016.
Its totient is φ = 1333332.
The previous prime is 3999971. The next prime is 4000037. The reversal of 4000002 is 2000004.
Adding to 4000002 its reverse (2000004), we get a palindrome (6000006).
It is a sphenic number, since it is the product of 3 distinct primes.
4000002 is an admirable number.
It is a Harshad number since it is a multiple of its sum of digits (6), and also a Moran number because the ratio is a prime number: 666667 = 4000002 / (4 + 0 + 0 + 0 + 0 + 0 + 2).
It is not an unprimeable number, because it can be changed into a prime (2) 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, 333328 + ... + 333339.
It is an arithmetic number, because the mean of its divisors is an integer number (1000002).
Almost surely, 24000002 is an apocalyptic number.
4000002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
4000002 is a wasteful number, since it uses less digits than its factorization.
4000002 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 666672.
The product of its (nonzero) digits is 8, while the sum is 6.
The square root of 4000002 is about 2000.0004999999.
Note that the first 3 decimals coincide.
The cubic root of 4000002 is about 158.7401316535.
The spelling of 4000002 in words is "four million, two", and thus it is an aban number and an eban number.