400216 has 16 divisors (see below), whose sum is σ = 790200. Its totient is φ = 189504.

The previous prime is 400207. The next prime is 400217. The reversal of 400216 is 612004.

It is a junction number, because it is equal to n+sod(n) for n = 400196 and 400205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400217) 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, 1165 + ... + 1468.

2⁴⁰⁰²¹⁶ is an apocalyptic number.

It is an amenable number.

400216 is a deficient number, since it is larger than the sum of its proper divisors (389984).

400216 is a wasteful number, since it uses less digits than its factorization.

400216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 400216 is about 632.6262719805. The cubic root of 400216 is about 73.6938900997.

It can be divided in two parts, 400 and 216, that added together give a palindrome (616).

The spelling of 400216 in words is "four hundred thousand, two hundred sixteen".