400444402 has 8 divisors (see below), whose sum is σ = 609126912.
Its totient is φ = 197402100.
The previous prime is 400444381. The next prime is 400444403. The reversal of 400444402 is 204444004.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not an unprimeable number, because it can be changed into a prime (400444403) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409874 + ... + 1410157.
It is an arithmetic number, because the mean of its divisors is an integer number (76140864).
Almost surely, 2400444402 is an apocalyptic number.
400444402 is a deficient number, since it is larger than the sum of its proper divisors (208682510).
400444402 is a wasteful number, since it uses less digits than its factorization.
400444402 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2820104.
The product of its (nonzero) digits is 2048, while the sum is 22.
The square root of 400444402 is about 20011.1069658827.
The cubic root of 400444402 is about 737.0790638999.
Adding to 400444402 its reverse (204444004), we get a palindrome (604888406).
The spelling of 400444402 in words is "four hundred million, four hundred forty-four thousand, four hundred two".