400444004 has 6 divisors (see below), whose sum is σ = 700777014. Its totient is φ = 200222000.

The previous prime is 400444003. The next prime is 400444021.

400444004 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 302829604 + 97614400 = 17402^2 + 9880^2 .

It is not an unprimeable number, because it can be changed into a prime (400444003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055497 + ... + 50055504.

It is an arithmetic number, because the mean of its divisors is an integer number (116796169).

Almost surely, 2^400444004 is an apocalyptic number.

It is an amenable number.

400444004 is a deficient number, since it is larger than the sum of its proper divisors (300333010).

400444004 is a wasteful number, since it uses less digits than its factorization.

400444004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100111005 (or 100111003 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400444004 is about 20011.0970214029. The cubic root of 400444004 is about 737.0788197066.

The spelling of 400444004 in words is "four hundred million, four hundred forty-four thousand, four".