655180 has 48 divisors (see below), whose sum is σ = 1524096. Its totient is φ = 235520.

The previous prime is 655157. The next prime is 655181. The reversal of 655180 is 81556.

It is not an unprimeable number, because it can be changed into a prime (655181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13917 + ... + 13963.

It is an arithmetic number, because the mean of its divisors is an integer number (31752).

2⁶⁵⁵¹⁸⁰ 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 655180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762048).

655180 is an abundant number, since it is smaller than the sum of its proper divisors (868916).

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

655180 is a wasteful number, since it uses less digits than its factorization.

655180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 655180 is about 809.4318995444. The cubic root of 655180 is about 86.8534106075.

The spelling of 655180 in words is "six hundred fifty-five thousand, one hundred eighty".