400443201 has 6 divisors (see below), whose sum is σ = 578417970. Its totient is φ = 266962128.

The previous prime is 400443137. The next prime is 400443217. The reversal of 400443201 is 102344004.

It can be written as a sum of positive squares in only one way, i.e., 355284801 + 45158400 = 18849^2 + 6720^2 .

It is not a de Polignac number, because 400443201 - 2⁶ = 400443137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400443301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22246836 + ... + 22246853.

It is an arithmetic number, because the mean of its divisors is an integer number (96402995).

Almost surely, 2^400443201 is an apocalyptic number.

It is an amenable number.

400443201 is a deficient number, since it is larger than the sum of its proper divisors (177974769).

400443201 is a wasteful number, since it uses less digits than its factorization.

400443201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44493695 (or 44493692 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400443201 is about 20011.0769575253. The cubic root of 400443201 is about 737.0783270245.

Adding to 400443201 its reverse (102344004), we get a palindrome (502787205).

The spelling of 400443201 in words is "four hundred million, four hundred forty-three thousand, two hundred one".