866484 has 48 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 282240.

The previous prime is 866477. The next prime is 866513. The reversal of 866484 is 484668.

866484 is a `hidden beast` number, since 8 + 6 + 648 + 4 = 666.

866484 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7612 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁸⁶⁶⁴⁸⁴ 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 866484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120).

866484 is an abundant number, since it is smaller than the sum of its proper divisors (1431756).

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

866484 is a wasteful number, since it uses less digits than its factorization.

866484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 189 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 866484 is about 930.8512233435. The cubic root of 866484 is about 95.3352513456.

The spelling of 866484 in words is "eight hundred sixty-six thousand, four hundred eighty-four".