400444071 has 4 divisors (see below), whose sum is σ = 533925432. Its totient is φ = 266962712.

The previous prime is 400444069. The next prime is 400444087. The reversal of 400444071 is 170444004.

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

It is a cyclic number.

It is not a de Polignac number, because 400444071 - 2¹ = 400444069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66740676 + ... + 66740681.

It is an arithmetic number, because the mean of its divisors is an integer number (133481358).

Almost surely, 2^400444071 is an apocalyptic number.

400444071 is a deficient number, since it is larger than the sum of its proper divisors (133481361).

400444071 is a wasteful number, since it uses less digits than its factorization.

400444071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133481360.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 400444071 is about 20011.0986954740. The cubic root of 400444071 is about 737.0788608145.

Adding to 400444071 its reverse (170444004), we get a palindrome (570888075).

The spelling of 400444071 in words is "four hundred million, four hundred forty-four thousand, seventy-one".