400000204402 has 4 divisors (see below), whose sum is σ = 600000306606. Its totient is φ = 200000102200.

The previous prime is 400000204291. The next prime is 400000204463. The reversal of 400000204402 is 204402000004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 277150655401 + 122849549001 = 526451^2 + 350499^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000051099 + ... + 100000051102.

Almost surely, 2^400000204402 is an apocalyptic number.

400000204402 is a deficient number, since it is larger than the sum of its proper divisors (200000102204).

400000204402 is a wasteful number, since it uses less digits than its factorization.

400000204402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200000102203.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 400000204402 its reverse (204402000004), we get a palindrome (604402204406).

The spelling of 400000204402 in words is "four hundred billion, two hundred four thousand, four hundred two".