655824 has 40 divisors (see below), whose sum is σ = 1826272. Its totient is φ = 201600.

The previous prime is 655807. The next prime is 655847. The reversal of 655824 is 428556.

655824 is nontrivially palindromic in base 11.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 655791 and 655800.

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, 99 + ... + 1149.

2⁶⁵⁵⁸²⁴ 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 655824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913136).

655824 is an abundant number, since it is smaller than the sum of its proper divisors (1170448).

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

655824 is a wasteful number, since it uses less digits than its factorization.

655824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1069 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 655824 is about 809.8296117085. The cubic root of 655824 is about 86.8818584030.

The spelling of 655824 in words is "six hundred fifty-five thousand, eight hundred twenty-four".