655500 has 96 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 158400.

The previous prime is 655489. The next prime is 655507. The reversal of 655500 is 5556.

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 655500.

It is not an unprimeable number, because it can be changed into a prime (655507) by changing a digit.

655500 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28489 + ... + 28511.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2⁶⁵⁵⁵⁰⁰ is an apocalyptic number.

655500 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 655500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048320).

655500 is an abundant number, since it is smaller than the sum of its proper divisors (1441140).

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

655500 is a wasteful number, since it uses less digits than its factorization.

655500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 655500 is about 809.6295449155. The cubic root of 655500 is about 86.8675484870.

It can be divided in two parts, 65 and 5500, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 655500 in words is "six hundred fifty-five thousand, five hundred".