864214216 has 8 divisors (see below), whose sum is σ = 1620401670. Its totient is φ = 432107104.

The previous prime is 864214199. The next prime is 864214229. The reversal of 864214216 is 612412468.

It can be written as a sum of positive squares in only one way, i.e., 657717316 + 206496900 = 25646^2 + 14370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×864214216² = 1493732422272989312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54013381 + ... + 54013396.

Almost surely, 2^864214216 is an apocalyptic number.

It is an amenable number.

864214216 is a deficient number, since it is larger than the sum of its proper divisors (756187454).

864214216 is a wasteful number, since it uses less digits than its factorization.

864214216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108026783 (or 108026779 counting only the distinct ones).

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

The square root of 864214216 is about 29397.5205757220. The cubic root of 864214216 is about 952.5193391912.

The spelling of 864214216 in words is "eight hundred sixty-four million, two hundred fourteen thousand, two hundred sixteen".