655320 has 64 divisors (see below), whose sum is σ = 2027520. Its totient is φ = 169344.

The previous prime is 655301. The next prime is 655331. The reversal of 655320 is 23556.

It is a nialpdrome in base 10.

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 655320.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5097 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (31680).

2⁶⁵⁵³²⁰ is an apocalyptic number.

655320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013760).

655320 is an abundant number, since it is smaller than the sum of its proper divisors (1372200).

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

655320 is a wasteful number, since it uses less digits than its factorization.

655320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 655320 is about 809.5183753319. The cubic root of 655320 is about 86.8595964961.

Adding to 655320 its reverse (23556), we get a palindrome (678876).

The spelling of 655320 in words is "six hundred fifty-five thousand, three hundred twenty".