864664212 has 24 divisors (see below), whose sum is σ = 2047664416. Its totient is φ = 283919328.

The previous prime is 864664189. The next prime is 864664219. The reversal of 864664212 is 212466468.

864664212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864664219) 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, 536923 + ... + 538530.

Almost surely, 2^864664212 is an apocalyptic number.

It is an amenable number.

864664212 is an abundant number, since it is smaller than the sum of its proper divisors (1183000204).

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

864664212 is a wasteful number, since it uses less digits than its factorization.

864664212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075527 (or 1075525 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 864664212 is about 29405.1732183301. The cubic root of 864664212 is about 952.6846359854.

The spelling of 864664212 in words is "eight hundred sixty-four million, six hundred sixty-four thousand, two hundred twelve".