400002002402 has 8 divisors (see below), whose sum is σ = 601154642412. Its totient is φ = 199617121600.

The previous prime is 400002002383. The next prime is 400002002417. The reversal of 400002002402 is 204200200004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 376211716321 + 23790286081 = 613361^2 + 154241^2 .

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

It is a super-2 number, since 2×400002002402² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191938499 + ... + 191940582.

Almost surely, 2^400002002402 is an apocalyptic number.

400002002402 is a deficient number, since it is larger than the sum of its proper divisors (201152640010).

400002002402 is a wasteful number, since it uses less digits than its factorization.

400002002402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383879604.

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 400002002402 its reverse (204200200004), we get a palindrome (604202202406).

It can be divided in two parts, 40000 and 2002402, that added together give a palindrome (2042402).

The spelling of 400002002402 in words is "four hundred billion, two million, two thousand, four hundred two".