864906 has 16 divisors (see below), whose sum is σ = 1977024. Its totient is φ = 247104.

The previous prime is 864901. The next prime is 864911. The reversal of 864906 is 609468.

It is an interprime number because it is at equal distance from previous prime (864901) and next prime (864911).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (864901) by changing a digit.

864906 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 7 ways as a sum of consecutive naturals, for example, 10255 + ... + 10338.

It is an arithmetic number, because the mean of its divisors is an integer number (123564).

2⁸⁶⁴⁹⁰⁶ is an apocalyptic number.

864906 is an abundant number, since it is smaller than the sum of its proper divisors (1112118).

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

864906 is a wasteful number, since it uses less digits than its factorization.

864906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20605.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 864906 is about 930.0032258009. The cubic root of 864906 is about 95.2773428159.

It can be divided in two parts, 864 and 906, that added together give a triangular number (1770 = T₅₉).

The spelling of 864906 in words is "eight hundred sixty-four thousand, nine hundred six".