866453994 has 48 divisors (see below), whose sum is σ = 2271716928. Its totient is φ = 232995456.

The previous prime is 866453993. The next prime is 866454037. The reversal of 866453994 is 499354668.

866453994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 866453994.

It is not an unprimeable number, because it can be changed into a prime (866453993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200112 + ... + 204395.

It is an arithmetic number, because the mean of its divisors is an integer number (47327436).

Almost surely, 2^866453994 is an apocalyptic number.

866453994 is an abundant number, since it is smaller than the sum of its proper divisors (1405262934).

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

866453994 is a wasteful number, since it uses less digits than its factorization.

866453994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404539 (or 404536 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 866453994 is about 29435.5906004959. The cubic root of 866453994 is about 953.3415085883.

The spelling of 866453994 in words is "eight hundred sixty-six million, four hundred fifty-three thousand, nine hundred ninety-four".