286705216 has 56 divisors (see below), whose sum is σ = 656392896. Its totient is φ = 121704960.

The previous prime is 286705213. The next prime is 286705229. The reversal of 286705216 is 612507682.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (286705213) 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, 44946 + ... + 50926.

Almost surely, 2^286705216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286705216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328196448).

286705216 is an abundant number, since it is smaller than the sum of its proper divisors (369687680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

286705216 is a wasteful number, since it uses less digits than its factorization.

286705216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107 (or 6097 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 286705216 is about 16932.3718362195. The cubic root of 286705216 is about 659.3943142400.

The spelling of 286705216 in words is "two hundred eighty-six million, seven hundred five thousand, two hundred sixteen".