6400216 has 16 divisors (see below), whose sum is σ = 12041640. Its totient is φ = 3189120.

The previous prime is 6400201. The next prime is 6400231. The reversal of 6400216 is 6120046.

It is an interprime number because it is at equal distance from previous prime (6400201) and next prime (6400231).

It is a junction number, because it is equal to n+sod(n) for n = 6400193 and 6400202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440 + ... + 3856.

Almost surely, 2^6400216 is an apocalyptic number.

It is an amenable number.

6400216 is a deficient number, since it is larger than the sum of its proper divisors (5641424).

6400216 is a wasteful number, since it uses less digits than its factorization.

6400216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 6400216 is about 2529.8648185229. The cubic root of 6400216 is about 185.6656420360.

The spelling of 6400216 in words is "six million, four hundred thousand, two hundred sixteen".