40004002 has 8 divisors (see below), whose sum is σ = 60311196. Its totient is φ = 19900272.

The previous prime is 40003991. The next prime is 40004011. The reversal of 40004002 is 20040004.

It can be written as a sum of positive squares in 2 ways, for example, as 39702601 + 301401 = 6301^2 + 549^2 .

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 40004002.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 50373 + ... + 51160.

Almost surely, 2^40004002 is an apocalyptic number.

40004002 is a deficient number, since it is larger than the sum of its proper divisors (20307194).

40004002 is a wasteful number, since it uses less digits than its factorization.

40004002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101732.

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

The square root of 40004002 is about 6324.8716983035. The cubic root of 40004002 is about 342.0065944946.

Adding to 40004002 its reverse (20040004), we get a palindrome (60044006).

The spelling of 40004002 in words is "forty million, four thousand, two", and thus it is an eban number.