866480 has 20 divisors (see below), whose sum is σ = 2014752. Its totient is φ = 346560.

The previous prime is 866477. The next prime is 866513. The reversal of 866480 is 84668.

It is a tau number, because it is divible by the number of its divisors (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866480.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5336 + ... + 5495.

2⁸⁶⁶⁴⁸⁰ is an apocalyptic number.

866480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866480 is an abundant number, since it is smaller than the sum of its proper divisors (1148272).

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

866480 is a wasteful number, since it uses less digits than its factorization.

866480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10844 (or 10838 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 866480 is about 930.8490747699. The cubic root of 866480 is about 95.3351046449.

The spelling of 866480 in words is "eight hundred sixty-six thousand, four hundred eighty".