400663671 has 8 divisors (see below), whose sum is σ = 540221040. Its totient is φ = 264107712.

The previous prime is 400663661. The next prime is 400663691. The reversal of 400663671 is 176366004.

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

It is not a de Polignac number, because 400663671 - 2¹¹ = 400661623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400663651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750040 + ... + 750573.

It is an arithmetic number, because the mean of its divisors is an integer number (67527630).

Almost surely, 2^400663671 is an apocalyptic number.

400663671 is a deficient number, since it is larger than the sum of its proper divisors (139557369).

400663671 is a wasteful number, since it uses less digits than its factorization.

400663671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500705.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 400663671 is about 20016.5848985285. The cubic root of 400663671 is about 737.2135720435.

The spelling of 400663671 in words is "four hundred million, six hundred sixty-three thousand, six hundred seventy-one".