655864 has 32 divisors (see below), whose sum is σ = 1393200. Its totient is φ = 286720.

The previous prime is 655859. The next prime is 655883. The reversal of 655864 is 468556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2424 + ... + 2680.

2⁶⁵⁵⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696600).

655864 is an abundant number, since it is smaller than the sum of its proper divisors (737336).

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

655864 is a wasteful number, since it uses less digits than its factorization.

655864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 299 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 655864 is about 809.8543078851. The cubic root of 655864 is about 86.8836247325.

It can be divided in two parts, 65 and 5864, that added together give a square (5929 = 77²).

The spelling of 655864 in words is "six hundred fifty-five thousand, eight hundred sixty-four".