866460 has 48 divisors (see below), whose sum is σ = 2774016. Its totient is φ = 197952.

The previous prime is 866443. The next prime is 866461. The reversal of 866460 is 64668.

It is a happy number.

866460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866461) by changing a digit.

866460 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (57792).

2⁸⁶⁶⁴⁶⁰ is an apocalyptic number.

It is an amenable number.

866460 is an abundant number, since it is smaller than the sum of its proper divisors (1907556).

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

866460 is a wasteful number, since it uses less digits than its factorization.

866460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082 (or 2080 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 866460 is about 930.8383318278. The cubic root of 866460 is about 95.3343711343.

866460 divided by its sum of digits (30) gives a palindrome (28882).

It can be divided in two parts, 866 and 460, that added together give a triangular number (1326 = T₅₁).

The spelling of 866460 in words is "eight hundred sixty-six thousand, four hundred sixty".