866816292 has 12 divisors (see below), whose sum is σ = 2022571376. Its totient is φ = 288938760.

The previous prime is 866816273. The next prime is 866816297. The reversal of 866816292 is 292618668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (866816297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36117334 + ... + 36117357.

Almost surely, 2^866816292 is an apocalyptic number.

It is an amenable number.

866816292 is an abundant number, since it is smaller than the sum of its proper divisors (1155755084).

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

866816292 is a wasteful number, since it uses less digits than its factorization.

866816292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72234698 (or 72234696 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 866816292 is about 29441.7440380151. The cubic root of 866816292 is about 953.4743664183.

The spelling of 866816292 in words is "eight hundred sixty-six million, eight hundred sixteen thousand, two hundred ninety-two".