400401071 has 8 divisors (see below), whose sum is σ = 457734144. Its totient is φ = 343101240.

The previous prime is 400401059. The next prime is 400401073. The reversal of 400401071 is 170104004.

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

It is a cyclic number.

It is not a de Polignac number, because 400401071 - 2¹⁴ = 400384687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400401073) 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 7 ways as a sum of consecutive naturals, for example, 28226 + ... + 39968.

It is an arithmetic number, because the mean of its divisors is an integer number (57216768).

Almost surely, 2^400401071 is an apocalyptic number.

400401071 is a deficient number, since it is larger than the sum of its proper divisors (57333073).

400401071 is a wasteful number, since it uses less digits than its factorization.

400401071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16621.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 400401071 is about 20010.0242628539. The cubic root of 400401071 is about 737.0524771671.

Adding to 400401071 its reverse (170104004), we get a palindrome (570505075).

The spelling of 400401071 in words is "four hundred million, four hundred one thousand, seventy-one".