864516 has 12 divisors (see below), whose sum is σ = 2017232. Its totient is φ = 288168.

The previous prime is 864511. The next prime is 864533. The reversal of 864516 is 615468.

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 (864511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36010 + ... + 36033.

2⁸⁶⁴⁵¹⁶ is an apocalyptic number.

It is an amenable number.

864516 is an abundant number, since it is smaller than the sum of its proper divisors (1152716).

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

864516 is a wasteful number, since it uses less digits than its factorization.

864516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72050 (or 72048 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 864516 is about 929.7935254668. The cubic root of 864516 is about 95.2630199685.

The spelling of 864516 in words is "eight hundred sixty-four thousand, five hundred sixteen".