400816843 has 8 divisors (see below), whose sum is σ = 458728160. Its totient is φ = 343068480.

The previous prime is 400816841. The next prime is 400816853. The reversal of 400816843 is 348618004.

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 400816843 - 2¹ = 400816841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400816799 and 400816808.

It is not an unprimeable number, because it can be changed into a prime (400816841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35418 + ... + 45343.

It is an arithmetic number, because the mean of its divisors is an integer number (57341020).

Almost surely, 2^400816843 is an apocalyptic number.

400816843 is a deficient number, since it is larger than the sum of its proper divisors (57911317).

400816843 is an equidigital number, since it uses as much as digits as its factorization.

400816843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81477.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 400816843 is about 20020.4106601238. The cubic root of 400816843 is about 737.3075046016.

The spelling of 400816843 in words is "four hundred million, eight hundred sixteen thousand, eight hundred forty-three".