400442002 has 8 divisors (see below), whose sum is σ = 604489356. Its totient is φ = 198945552.

The previous prime is 400441999. The next prime is 400442033. The reversal of 400442002 is 200244004.

It can be written as a sum of positive squares in 2 ways, for example, as 325116961 + 75325041 = 18031^2 + 8679^2 .

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

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, 637333 + ... + 637960.

Almost surely, 2^400442002 is an apocalyptic number.

400442002 is a deficient number, since it is larger than the sum of its proper divisors (204047354).

400442002 is a wasteful number, since it uses less digits than its factorization.

400442002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275452.

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

The square root of 400442002 is about 20011.0469990953. The cubic root of 400442002 is about 737.0775913748.

Adding to 400442002 its reverse (200244004), we get a palindrome (600686006).

The spelling of 400442002 in words is "four hundred million, four hundred forty-two thousand, two".