864654 has 48 divisors (see below), whose sum is σ = 2142288. Its totient is φ = 231168.

The previous prime is 864641. The next prime is 864673. The reversal of 864654 is 456468.

It is a happy number.

864654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864654.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4912 + ... + 5084.

It is an arithmetic number, because the mean of its divisors is an integer number (44631).

2⁸⁶⁴⁶⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071144).

864654 is an abundant number, since it is smaller than the sum of its proper divisors (1277634).

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

864654 is a wasteful number, since it uses less digits than its factorization.

864654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 202 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 864654 is about 929.8677325297. The cubic root of 864654 is about 95.2680885453.

Multiplying 864654 by its sum of digits (33), we get a palindrome (28533582).

The spelling of 864654 in words is "eight hundred sixty-four thousand, six hundred fifty-four".