655340 has 48 divisors (see below), whose sum is σ = 1634304. Its totient is φ = 216000.

The previous prime is 655337. The next prime is 655351. The reversal of 655340 is 43556.

Added to its reverse (43556) it gives a square (698896 = 836²).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655340.

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, 4265 + ... + 4415.

It is an arithmetic number, because the mean of its divisors is an integer number (34048).

2⁶⁵⁵³⁴⁰ 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 655340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817152).

655340 is an abundant number, since it is smaller than the sum of its proper divisors (978964).

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

655340 is a wasteful number, since it uses less digits than its factorization.

655340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 655340 is about 809.5307282618. The cubic root of 655340 is about 86.8604801226.

Adding to 655340 its reverse (43556), we get a palindrome (698896).

The spelling of 655340 in words is "six hundred fifty-five thousand, three hundred forty".